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Issues

ISSN 0016-7606
EISSN 1943-2674
In this Issue

Bulletin of the Geological Society of America

GSA Bulletin April 01, 1940, Vol.51, 489-511. doi:10.1130/GSAB-51-489
GSA Bulletin April 01, 1940, Vol.51, 513-539. doi:10.1130/GSAB-51-513
GSA Bulletin April 01, 1940, Vol.51, 541-556. doi:10.1130/GSAB-51-541
GSA Bulletin April 01, 1940, Vol.51, 557-569. doi:10.1130/GSAB-51-557
GSA Bulletin April 01, 1940, Vol.51, 571-595. doi:10.1130/GSAB-51-571
GSA Bulletin April 01, 1940, Vol.51, 597-637. doi:10.1130/GSAB-51-597
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