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Authors: HELLAND PE HUANG PH DIFFENDAL RF
Citation: Pe. Helland et al., SEM ANALYSIS OF QUARTZ SAND GRAIN SURFACE TEXTURES INDICATES ALLUVIALCOLLUVIAL ORIGIN OF THE QUATERNARY GLACIAL BOULDER CLAYS AT HUANGSHAN(YELLOW MOUNTAIN), EAST-CENTRAL CHINA/, Quaternary research, 48(2), 1997, pp. 177-186

Authors: HELLAND PE HOLMES MA
Citation: Pe. Helland et Ma. Holmes, SURFACE TEXTURAL ANALYSIS OF QUARTZ SAND GRAINS FROM ODP SITE-918 OFFTHE SOUTHEAST COAST OF GREENLAND SUGGESTS GLACIATION OF SOUTHERN GREENLAND AT 11 MA, Palaeogeography, palaeoclimatology, palaeoecology, 135(1-4), 1997, pp. 109-121

Authors: HELLAND PE DIFFENDAL RF
Citation: Pe. Helland et Rf. Diffendal, PROBABLE GLACIAL CLIMATIC CONDITIONS IN-SOURCE AREAS DURING DEPOSITION OF PARTS OF THE ASH HOLLOW FORMATION, OGALLALA GROUP (LATE TERTIARY), OF WESTERN NEBRASKA, American journal of science, 293(8), 1993, pp. 744-757
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