At the initiative of Willem van der Gracht, the American Association of Petroleum Geologists organised a symposium on the continental drift hypothesis
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At the initiative of Willem van der Gracht, the American Association of Petroleum Geologists organised a symposium on the continental drift hypothesis
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-17 from Wikipedia. The archived copy is preserved so this citation survives link rot.