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Bulletin of the Geological Society of America

GSA Bulletin May 01, 1938, Vol.49, 669-682. doi:https://doi.org/10.1130/GSAB-49-669
GSA Bulletin May 01, 1938, Vol.49, 683-730. doi:https://doi.org/10.1130/GSAB-49-683
GSA Bulletin May 01, 1938, Vol.49, 731-762. doi:https://doi.org/10.1130/GSAB-49-731
GSA Bulletin May 01, 1938, Vol.49, 763-794. doi:https://doi.org/10.1130/GSAB-49-763
GSA Bulletin May 01, 1938, Vol.49, 795-830. doi:https://doi.org/10.1130/GSAB-49-795
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