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

Fresh-water biology - Ward, Henry Baldwin, 1865 -1945 (John Wiley & sons, inc.; [etc.,etc.], 1918)

Fresh-water biology - Ward, Henry Baldwin, 1865 -1945 (John Wiley & sons, inc.; [etc., etc.], 1918)

Fresh-water rhizopods of North America - Leidy, Joseph, 1823 -1891 (Government Printing Office, 1879)

Fresh-water rhizopods of North America - Leidy, Joseph, 1823 -1891 (G.P.O, 1879)