Darrah,William C. Principles of paleobotany. 2.ed. - 2.ed. - Leiden - HOLA Chronica botanica 1939 - 239p. 25cm - A new series of plant science books v.3 . ISBN: Subjects--Topical Terms: --Paleobotanica--Paleontologia--Fosiles--Verdoorn,F--Plantas fosiles--Geologia