Contribution to paleontology : studies of the Pliocene palaebotany of California. - Washington : Carnegie Institution, 1933. - 134 p. : il. ; 25 cm - Carnegie Inst. Publ 412 . Subjects--Topical Terms: PaleontologíaPaleobotánicaPlioceno Subjects--Geographic Terms: California Index Terms--Genre/Form: Seriemon Universal Decimal Class. No.: 561(794)