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Bulletin of the Geological Society of America

GSA Bulletin December 01, 1939, Vol.50, 1795-1826. doi:https://doi.org/10.1130/GSAB-50-1795
GSA Bulletin December 01, 1939, Vol.50, 1827-1850. doi:https://doi.org/10.1130/GSAB-50-1827
GSA Bulletin December 01, 1939, Vol.50, 1851-1866. doi:https://doi.org/10.1130/GSAB-50-1851
GSA Bulletin December 01, 1939, Vol.50, 1867-1884. doi:https://doi.org/10.1130/GSAB-50-1867
GSA Bulletin December 01, 1939, Vol.50, 1885-1898. doi:https://doi.org/10.1130/GSAB-50-1885
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