Parker, R. L., & Calkins, J. A. (1964). Geology of the Curlew quadrangle, Ferry County, Washington. U.S. Govt. Print. Off..
Style de citation Chicago (17e éd.)Parker, Raymond L., et James Alfred Calkins. Geology of the Curlew Quadrangle, Ferry County, Washington. Washington: U.S. Govt. Print. Off., 1964.
Style de citation MLA (8e éd.)Parker, Raymond L., et James Alfred Calkins. Geology of the Curlew Quadrangle, Ferry County, Washington. U.S. Govt. Print. Off., 1964.
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