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URL: aapgbull.geosci ... http://aapgbull.geoscienceworld.org/
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URL: aapgbull.geosci ... http://aapgbull.geoscienceworld.org/
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URL: books.google.co ... http://books.google.com/books?id=IZw1AQAAMAAJ
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URL: books.google.co ... http://books.google.com/books?id=LChGAQAAMAAJ
URL: books.google.co ... http://books.google.com/books?id=AhIWYvvM4aUC
URL: books.google.co ... http://books.google.com/books?id=IoRJi5TNIOMC
KEEPERS link: catalog.hathitr ... https://catalog.hathitrust.org/Record/012306925
KEEPERS link: archive.org/det ... https://archive.org/details/pub_american-association-of-petroleum-geologists-aapg
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