au.\*:("TUTTLE SD")
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DIFFERENTIATION OF DRIFT TOPOGRAPHIES BY STATISTICAL ANALYSIS OF SLOPE DATA.THOMAS B; TUTTLE SD.1968; PROC. IOWA ACAD. SCI.; USA; 1968, VOL. 74, P. 147 A 159Miscellaneous
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
GEOMORPHOLOGY IN IOWA 1943-1968. AN ANNOTATED BIBLIOGRAPHY OF THE LITERATURE.TUTTLE SD; PRIOR SJ JR.1968; PROC. IOWA ACAD. SCI.; USA; 1968(4), VOL. 75, P. 253 A 267Miscellaneous