Systema naturae per regna tria naturae, secundum classes, ordines, genera, species, cum characteribus, differentiis, synonymis, locis - Linné, Carl von, 1707 -1778 (Typis Ioannis Thomae von Trattner, 1767)

Systema natvræ per regna tria natvræ : secvndum classes, ordines, genera, species, cvm characteribus, differentiis, synonymis, locis - Gmelin, Johann Friedrich, 1748 -1804 (Typis Academicis, 1793)

Systema natvrae per regni tria natvrae secvndvm classes, ordines, genera, species, cvm characteribvs, differentiis, synonymis, locis - Linné, Carl von, 1707 -1778 (Io. Iac. Cvrt, 1760)

Systema reptilium. Fasciculus primus, Amblyglossae - Fitzinger, Leopold Joseph, 1802 -1884 (Braumüller et Seidel, 1843)

Systematische Phylogenie ... - Haeckel, Ernst, 1834 -1919 (G. Reimer, 1895)

Systematische phylogenie - Haeckel, Ernst, 1834 -1919 (Georg Reimer, 1895)

Tableau élémentaire de l'histoire naturelle des animaux - Cuvier, Georges, baron, 1769 -1832 (Baudouin, imprimeur, 1798)

Tableau encyclopédique et méthodique des trois règnes de la nature. Ophiologie - Bonnaterre, Pierre Joseph, abbé, 1752? -1804 (Chez Panckoucke, libraire, Hôtel de Thou, 1790)

Tableaux synoptiques de zoognosie : publiés à l'usage de ses élèves à l'Université Impériale de Moscou - Fischer von Waldheim, Gotthelf, 1771 -1853 (de l'Imprimerie de l'Université Impériale, 1808)

Tail-length differences in snakes, with notes on sexual dimorphism and the coefficient of divergence [and] A graphic method of showing relationships - Klauber, Laurence Monroe, 1883 -1968 (Zoological Society of San Diego, 1943)

Taxonomic status of miscellaneous Neotropical viperids, with the description of a new genus - Campbell, Jonathan A. (Museum of Texas Tech University, 1992)

Taxonomic studies of the rattlesnakes of mainland Mexico - Klauber, Laurence Monroe, 1883 -1968 (Zoological Society of San Diego, 1952)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1949)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1950)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1952)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1953)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1954)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1955)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1960)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1970)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1972)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1977)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1979)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1983)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1984)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1986)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1989)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1990)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1993)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1995)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 1999)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 2000)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 2001)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 2002)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 2004)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 2005)

The Texas journal of science - Texas Academy of Science. (Texas Academy of Science, 2006)

Texas nature observations and reminiscences - Menger, Rudolph, 1851 -1921 (Guessaz & Ferlet Company, 1913)

A text-book of bacteriology - Sternberg, George Miller, 1838 -1915 (W. Wood and company, 1901)

A text-book of bacteriology - Sternberg, George Miller, 1838 -1915 (Wood, 1901)

A text-book of bacteriology - Sternberg, George Miller, 1838 -1915 (Wm. Wood, 1896)

A text-book of materia medica and therapeutics : characteristic, analytical, and comparative - Cowperthwaite, A. C. (Allen Corson), 1848 -1926 (Gross & Delbridge, 1891)

Text-book of palaeontology - Eastman, Charles Rochester, 1868 -1918 (Macmillan, 1902)

Text book of vertebrate zoology - Kingsley, J. S. (John Sterling), 1854 -1929 (H. Holt and Company, 1899)

Text book of vertebrate zoology - Kingsley, J. S. (John Sterling), 1854 -1929 (H. Holt, 1899)

A text book of veterinary pathology, for students and practitioners - Kinsley, A. T. (Albert Thomas), 1877 -1941 (A. Eger, 1910)

A text book of veterinary pathology for students and practitioners - Kinsley, A. T. (Albert Thomas), 1877 -1941 (A. Eger, 1916)

A text book of veterinary pathology for students and practitioners - Kinsley, A. T. (Albert Thomas), 1877 -1941 (A. Eger, 1915)

A text-book of zoology - Parker, T. Jeffery (Thomas Jeffery), 1850 -1897 (Macmillan, 1921)

Text book of zoology - Boas, J. E. V. (Johan Erik Vesti), 1855 -1935 (Sampson Low, Marston, 1896)

Text-book of zoology - Schmeil, O. (Otto), 1860 -1943 (A. and C. Black, 1901)

A text-book of zoology - Parker, T. Jeffery (Thomas Jeffery), 1850 -1897 (Macmillan and Co., Limited, 1910)

A text-book of zoology - Parker, T. Jeffery (Thomas Jeffery), 1850 -1897 (Macmillian and co., limited, 1910)

A text-book of zoology - Parker, T. Jeffery (Thomas Jeffery), 1850 -1897 (Macmillan and co., limited, 1897)

A text-book of zoology - Parker, T. Jeffery (Thomas Jeffery), 1850 -1897 (Macmillan, 1910)

A text-book of zoology - Parker, T. Jeffery (Thomas Jeffery), 1850 -1897 (Macmillian and co., limited, 1921)

Text-book of zoology for junior students - Nicholson, Henry Alleyne, 1844 -1899 (1888)

Text-book of zoology for junior students - Nicholson, Henry Alleyne, 1844 -1899 (American Book Co, 1885)

A text-book of zoology for schools - Gosse, Philip Henry, 1810 -1888 (Society for Promoting Christian Knowledge, 1851)

Text-book of zoology for schools and colleges - Nicholson, Henry Alleyne, 1844 -1899 (D. Appleton and Co, 1884)

A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians - McFarland, Joseph, 1868 -1945 (W. B. Saunders Company, 1916)

A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians - McFarland, Joseph, 1868 -1945 (W. B. Saunders Company, 1919)

A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians - McFarland, Joseph, 1868 -1945 (W.B. Saunders company, 1915)

A text-book upon the pathogenic Bacteria and Protozoa for students of medicine and physicians - McFarland, Joseph, 1868 -1945 (W. B. Saunders company, 1919)

A text-book upon the pathogenic bacteria, for students of medicine and physicians - McFarland, Joseph, 1868 -1945 (W. B. Saunders company, 1906)

A text-book upon the pathogenic bacteria, for students of medicine and physicians - McFarland, Joseph, 1868 -1945 (W. B. Saunders company, 1909)

Textbook of zoology - Potter, George Edwin, 1898 - (Mosby, 1947)

The thanatophidia of India : being a description of the venomous snakes of the Indian Peninsula, with an account of the influence of their poison on life and a series of experiments - Fayrer, Joseph, Sir, 1824 -1907 (J. and A. Churchill, 1874)

Das Thierreich eingetheilt nach dem Bau der Thiere als Grundlage ihrer Naturgeschichte und der vergleichenden Anatomie - Cuvier, Georges, baron, 1769 -1832 (J.S. Cotta, 1822)

Das Thierreich eingetheilt nach dem Bau der Thiere als Grundlage ihrer Naturgeschichte und der vergleichenden Anatomie - Cuvier, Georges, baron, 1769 -1832 (J.S. Cotta, 1825)

Das Thierreich, geordnet nach seiner Organisation : als Grundlage der Naturgeschichte der Thiere und Einleitung in die vergleichende Anatomie - Cuvier, Georges, baron, 1769 -1832 (F.A. Brockhaus, 1832)

Das Thierreich geordnet nach seiner Organisation : als Grundlage der Naturgeschichte der Thiere und als Einleitung in die vergleichende Anatomie - Cuvier, Georges, baron, 1769 -1832 (Druck und Verlage von G. Reimer, 1846)

Das Thierreich in seinen Hauptformen systematisch beschrieben - Kaup, J. J. (Johann Jacob), 1803 -1873 (Diehl, 1835)

Ticks, a monograph of the Ixodoidea - Nuttall, George Henry Falkiner, 1862 -1937 (University press, 1908)

Tidsskrift for populære fremstillinger af naturvidenskaben (P.G. Philipsens forlag, 1868)

Tierbau und tierleben in ihrem zusammenhang betrachtet - Doflein, Franz, 1873 -1924 (B. G. Teubner, 1914)

Tierleben : allgemeine Kunde des Tierreichs - Brehm, Alfred Edmund, 1829 -1884 (Bibliographisches Institut, 1911)