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The geologic time classification of the United States Geological Survey compared with other classifications, accompanied by the original definitions of era, period and epoch terms

January 1, 1925
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Citation Information

Publication Year 1925
Title The geologic time classification of the United States Geological Survey compared with other classifications, accompanied by the original definitions of era, period and epoch terms
DOI 10.3133/b769
Authors Mary Grace Wilmarth
Publication Type Report
Publication Subtype USGS Numbered Series
Series Title Bulletin
Series Number 769
Index ID b769
Record Source USGS Publications Warehouse