Parker, R. L., & Calkins, J. A. (1964). Geology of the Curlew quadrangle, Ferry County, Washington. U.S. Govt. Print. Off..
Cita Chicago Style (17a ed.)Parker, Raymond L., y James Alfred Calkins. Geology of the Curlew Quadrangle, Ferry County, Washington. Washington: U.S. Govt. Print. Off., 1964.
Cita MLA (8a ed.)Parker, Raymond L., y James Alfred Calkins. Geology of the Curlew Quadrangle, Ferry County, Washington. U.S. Govt. Print. Off., 1964.
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