Stoffel, K. L. (1984). Geology of the Grande Ronde lignite field, Asotin County, Washington. For sale by The Dept. of Natural Resources.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रStoffel, Keith L. Geology of the Grande Ronde Lignite Field, Asotin County, Washington. Olympia, Wash.: For sale by The Dept. of Natural Resources, 1984.
एमएलए (8वां संस्करण) प्रशस्ति पत्रStoffel, Keith L. Geology of the Grande Ronde Lignite Field, Asotin County, Washington. For sale by The Dept. of Natural Resources, 1984.
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