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ISSN 0016-7606
EISSN 1943-2674
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Bulletin of the Geological Society of America

GSA Bulletin December 31, 1931, Vol.42, 853-864. doi:10.1130/GSAB-42-853
GSA Bulletin December 31, 1931, Vol.42, 865-922. doi:10.1130/GSAB-42-865
GSA Bulletin December 31, 1931, Vol.42, 923-984. doi:10.1130/GSAB-42-923
GSA Bulletin December 31, 1931, Vol.42, 985-1010. doi:10.1130/GSAB-42-985
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