au.\*:("SEMKEN HA JR")
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EARTH SCIENCE PART 2 : LABORATORY STUDIES IN HISTORICAL GEOLOGY STRUCTURES, FOSSILS, GEOLOGIC MAPS AND DIAGRAMMS, EARTH HISTORY.SEMKEN HA JR; TUTTLE SD.1968; WM.C.BROWN.BOOK.COMPANY.PUBLISHERS.DUBUQUE.IOWA.; 1968, NUM. 002 , P. 1 A 182Miscellaneous
VERTEBRATE PALEONTOLOGY AS A DISCIPLINE IN GEOCHRONOLOGY: THE NORTH AMERICAN PLEISTOCENE SEQUENCELUNDELIUS EL JR; DOWNS T; LINDSAY E et al.1973; GEOL. SOC. AMER., ABSTR. PROGRAMS; USA; DA. 1973; VOL. 5; NO 7; PP. 721-722Article