Washington Agricultural Experiment Station & Gilkeson, R. A. (1958). Soil map of the Columbia Basin project--Washington. Washington Agricultural Experiment Stations, Institute of Agricultural Sciences, State College of Washington.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington Agricultural Experiment Station और Raymond Allen Gilkeson. Soil Map of the Columbia Basin Project--Washington. [Pullman, Wash.?: Washington Agricultural Experiment Stations, Institute of Agricultural Sciences, State College of Washington, 1958.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington Agricultural Experiment Station और Raymond Allen Gilkeson. Soil Map of the Columbia Basin Project--Washington. Washington Agricultural Experiment Stations, Institute of Agricultural Sciences, State College of Washington, 1958.