Agassiz, Louis Methods of study in natural history / Louis Agassiz - Boston : Houghton , Mifflin and Company, 1891 - vi, 819 p. : ill. ; 13 cm. Subjects--Topical Terms: AnimalsCoral reefs and islandsGenerations, AlternatingEmbryologyEvolution (Biology) Dewey Class. No.: 507 / AGM 1891