Floral World and Garden Guide (1876)

Form und Formel im Tierreiche. Beiträge zu einer quantitativen Biologie I - XX - Przibram, Hans, 1874 -1944 (F. Deuticke, 1922)

Forms of animal life; being outlines of zoological classification based upon anatomical investigation and illustrated by descriptions of specimens and of figures - Rolleston, George, 1829 -1881 (Clarendon press, 1870)

Forms of animal life : a manual of comparative anatomy : with descriptions of selected types - Rolleston, George, 1829 -1881 (Clarendon Press, 1888)

Forms of animal life; a manual of comparative anatomy, with descriptions of selected types - Rolleston, George, 1829 -1881 (Clarendon Press, 1888)

Forsøg til en islandsk naturhistorie, med adskillige oekonomiske samt andre anmærkninger - Holm, S. M., (Trykt hos Christian Friderik Holm, 1786)

Fortschritte der naturwissenschaftlichen Forschung. Hrsg. von E. Abderhalden - Abderhalden, Emil, 1877 -1950 (Urban & Schwarzenberg, 1910)

Die fossilen Infusorien und die lebendige Dammerde. Vorgetragen in der Akademie der Wissenschaften zu Berlin 1836 und 1837 - Ehrenberg, Christian Gottfried, 1795 -1876 (Druckerei der Königlichen Akademie der Wissenschaften, 1837)

Foundations of biology - Woodruff, Lorande Loss, 1879 -1947 (MacMillan, 1922)

Foundations of biology - Woodruff, Lorande Loss, 1879 -1947 (Macmillan, 1931)

Foundations of biology - Woodruff, Lorande Loss, 1879 -1947 (The Macmillan company, 1922)