Zoologischer Jahresbericht - Stazione zoologica di Napoli. (R. Friedlander, 1886)

Zoologischer Jahresbericht - Stazione zoologica di Napoli. (R. Friedlander, 1892)

Zoologischer Jahresbericht - Stazione zoologica di Napoli. (R. Friedlander, 1913)

Zoologisches Centralblatt (W. Engelmann, 1895)

Zoologisches Centralblatt (W. Engelmann, 1896)

Zoologisches Centralblatt (W. Engelmann, 1897)

Zoologisches Centralblatt (W. Engelmann, 1898)

Zoologisches Centralblatt (W. Engelmann, 1902)

Zoologisches Zentralblatt (W. Engelmann, 1904)

Zoologisches Zentralblatt (W. Engelmann, 1905)

Zoologisches Zentralblatt (W. Engelmann, 1907)

Zoologisches Zentralblatt (W. Engelmann, 1909)

Zoologisches Zentralblatt (W. Engelmann, 1911)

Zoology : being a systematic account of the general structure, habits, instincts, and uses of the principal families of the animal kingdom, as well as of the chief forms of fossil remains - Carpenter, William Benjamin, 1813 -1885 (Bell & Daldy, 1866)

Zoology, complete volume - Staig, Robert A. (Livingstone, 1900)

Zoology : an elementary text-book - MacBride, E. W. (Ernest William), 1866 -1940 (Univ. Press, 1920)

Zoology for medical students - Kerr, John Graham, 1869 -1957 (Macmillan and co., ltd, 1921)

Zoology of the invertebrata : a text-book for students - Shipley, A. E. Sir, (Arthur Everett), 1861 -1927 (A. and C. Black, 1893)

Zur Morphology und Ontogenie der acariden - Reuter, Enzio, 1867 -1951 (1909)

Zur Zoogeographie der landbewohnenden Wirbellosen - Stoll, O. (1897)

Известия на Царските природонаучни институти в София = Izvestiia na Tsarskitia prirodonauchni instituti v Sofiia - Tsarskitie prirodonauchni instituti (Sofiia, Bulgaria) (Pechatnitsa P. Glushkov, 1930)

Известия на Царските природонаучни институти в София = Izvestiia na Tsarskitia prirodonauchni instituti v Sofiia - Tsarskitie prirodonauchni instituti (Sofiia, Bulgaria) (Pechatnitsa P. Glushkov, 1936)