Zoology : a systematic account of the general structure, habits, instincts, and uses of the principal families of the animal kingdom - Carpenter, William Benjamin, 1813 -1885 (Wm. S. Orr, 1848)

Zoonomia; or, The Laws of Organic Life ... - Darwin, Erasmus, 1731 -1802 (by D. Carlisle, for Thomas and Andrews, 1803)

Zoonomia ; or, The laws of organic life - Darwin, Erasmus, 1731 -1802 (J. Johnson, 1794)

Zoophilacium Gronovianum : exhibens animalia quadrupeda, amphibia, pisces, insecta, vermes, mollusca, testacea, et zoophyta - Gronovius, Laurentius Theodorus, 1730 -1777 (Apud Theodorum Haak et Socium et Samuelem et Johannem Luchtmans, 1781)

Zoophilacium Gronovianum : exhibens animalia quadrupeda, amphibia, pisces, insecta, vermes, mollusca, testacea, et zoophyta - Gronovius, Laurentius Theodorus, 1730 -1777 (Apud Theodorum Haak et Socium et Samuelem et Johannem Luchtmans, 1763)

Zur Fauna der Krym : ein Beitrag - Rathke, Heinrich, 1793 -1860 (s.n, 1837)

Zur Flora der Umgebung Lembergs - Tomaschek, Anton, 1826 -1891 (s.n, 1866)

Zur Flora Tirols 1. Heft Flora von Südtirol - Facchini, Francesco, 1788 -1852 (Druck Wagner, 1855)

Die Zweiflügler des Kaiserlichen Museums zu Wien - Brauer, Friedrich, 1832 -1904 (K.K. Hof-und Staatsdruckerei, 1893)