On animal and vegetable parasites of the human body a manual of their natural history, diagnosis, and treatment - Lankester, Edwin, 1814 -1874 (Printed for the Sydenham Society, 1857)

On animal and vegetable parasites of the human body, a manual of their natural history, diagnosis, and treatment - Küchenmeister, Friedrich, 1821 -1890 (Printed for the Sydenham society, 1857)

On animal and vegetable parasites of the human body, a manual of their natural history, diagnosis, and treatment - Küchenmeister, Friedrich, 1821 -1890 (Printed for the Sydenham Society, 1857)

On human entozoa : comprising the description of the different species of worms found in the intestines and other parts of the human body, and the pathology and treatment of the various affections produced by their presence : to which is added a glossary of the principal terms employed - Royal College of Physicians of Edinburgh. (H.K. Lewis, 1863)

On human entozoa: comprising the description of the different species of worms found in the intestines and other parts of the human body, and the pathology and treatment of the various affections produced by their presence - Smith, William Abbotts. (H. K. Lewis, 1863)

On parthenogenesis - Owen, Richard, 1804 -1892 (John Van Voorst, 1849)

On parthenogenesis, or The successive production of procreating indivduals from a single ovum. A discourse introductory to the Hunterian lectures on generation and development, for the year 1849, delivered at the Royal college of surgeons of England - Owen, Richard, 1804 -1892 (J. Van Voorst, 1849)

On some parasites of fishes new to the Scottish marine fauna - Scott, Thomas, 1840 -1929 (Fishery Board, 1904)

On tape and cystic worms : with an introduction on the origin of intestinal worms - Huxley, Thomas Henry, 1825 -1895 (Sydenham Society, 1857)

On the alternation of generations : or The propagation and development of animals through alternate generations / by Joh. Japetus Sm. Steenstrup ... Tr. from the German version of C.H. Lorenzen, by George Busk - Busk, George, 1807 -1886 (Printed for the Ray society, 1845)

On the prevalence of entozoa in the dog, with remarks on their relation to public health - Linnean Society of London. ([s.n.])

On a true parthenogenesis in moths and bees, a contribution to the history of reproduction in animals - Siebold, C. Th. E. von (Carl Theodor Ernst), 1804 -1885 (John Van Voorst, Paternoster Row, 1857)

On a true parthenogenesis in moths and bees; a contribution to the history of reproduction in animals - Siebold, C. Th. E. von (Carl Theodor Ernst), 1804 -1885 (J. Van Voorst, 1857)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1945)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1958)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1955)

Opinions and declarations rendered by the International Commission on Zoological Nomenclature - International Commission on Zoological Nomenclature (Printed by order of the International Trust for Zoological Nomenclature, 1956)