Jenkins, O. P. (1924). Geological investigation of the coal fields of Skagit county, Washington. F.M. Lamborn, public printer.
Chicago Style (17th ed.) CitationJenkins, Olaf P. Geological Investigation of the Coal Fields of Skagit County, Washington. Olympia: F.M. Lamborn, public printer, 1924.
MLA引文Jenkins, Olaf P. Geological Investigation of the Coal Fields of Skagit County, Washington. F.M. Lamborn, public printer, 1924.
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