The Geologic Setting of the John Day Country, Grants County, Oregon Thomas P. Thayer 1972
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The Geologic Setting of the John Day Country, Grants County, Oregon Thomas P. Thayer 1990
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cover only
Expedition ito the John Day River in 1878 Charles H. Sternberg 2001
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cover only
John Day Formation: Turtle Cove Member Joshua X. Samuels 2013
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