Over, W. H. (1923). Trees and shrubs of South Dakota. Pub. by the University.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रOver, William H. Trees and Shrubs of South Dakota. Vermillion, S.D.: Pub. by the University, 1923.
एमएलए (8वां संस्करण) प्रशस्ति पत्रOver, William H. Trees and Shrubs of South Dakota. Pub. by the University, 1923.
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