Kryptogamenflora für Anfänger : eine Einführung in das Studium der blütenlosen Gewächse für Studierende und Liebhaber - Lindau, Gustav, 1866 -1923 (Springer, 1922)

Kunene-Sambesi-expedition, H. Baum, 1903 - Deutsche Kolonialgesellschaft. Kolonial-wirtschaftliches Komitee. (Verlag des Kolonial-wirtschaftlichen Komitees, 1903)

Kunstformen der Natur - Bibliographisches Institut Leipzig. (Verlag des Bibliographischen Instituts, 1904)

Kunstformen der Natur - Bibliographisches Institut Leipzig. (Verlag des Bibliographischen Instituts, 1899)

Laboratory and field manual of botany - Bergen, Joseph Y. (Joseph Young), 1851 -1917 (Ginn & company, 1907)

Laboratory and field manual of botany - Bergen, Joseph Y. (Joseph Young), 1851 -1917 (Ginn & Company, 1907)

Laboratory directions in general biology - Conklin, Edwin Grant, 1863 -1952 (Princeton University Press, 1900)

Laboratory directions in general zoology - Dodds, Gideon Stanhope, 1880 - (1919)

A laboratory guide for general botany - Gager, C. Stuart (Charles Stuart), 1872 -1943 (Blakiston, 1916)

A laboratory guide for general botany - Gager, C. Stuart (Charles Stuart), 1872 -1943 (Blakiston, 1919)

A laboratory guide for general botany - Gager, C. Stuart (Charles Stuart), 1872 -1943 (P. Blakiston's Son & Co, 1919)

A laboratory manual in elementary biology; an inductive study in animal and plant morphology designed for preparatory and high schools - Boyer, Emanuel Roth, 1851 -1900 (Heath, 1894)

Laboratory manual in medical bacteriology - Columbia University. Dept. of Bacteriology. (Dougherty, 1929)

A laboratory manual in practical botany - Clark, Charles H. (Charles Herbert), 1854 - (American book company, 1898)

A laboratory manual of high school botany - Clements, Frederic E. (Frederic Edward), 1874 -1945 (The University publishing co, 1900)

The leaf spots of the elm - Miles, Lee Ellis, 1890 - (s.n, 1920)

Leaflets of Philippine botany (Oriental Printing Co, 1913)

Leaflets of Philippine botany (Oriental Printing Co, 1915)

Lectures on plant physiology - Harvey-Gibson, R. J. (Robert John), 1860 -1929 (Clarendon Press, 1907)

Lectures on plant physiology - Jost, Ludwig, 1865 -1947 (Clarendon Press, 1907)

Lectures on the evolution of plants (The Macmillan Co, 1899)

Lectures on the evolution of plants (The Macmillan company, 1899)

Lectures on the physiology of plants - Sachs, Julius, 1832 -1897 (Clarendon Press, 1887)

Lectures on the physiology of plants - Vines, Sydney Howard, 1849 -1934 (Univ. Press, 1886)

Lectures on the physiology of plants - Vines, Sydney Howard, 1849 -1934 (University Press, 1886)