Mitchell, B., & Mitchell, J. E. (1972). The watershed as a resource management unit: A selected bibliography. Council of Planning Librarians.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMitchell, Bruce, और Joan Elizabeth Mitchell. The Watershed as a Resource Management Unit: A Selected Bibliography. Monticello, Ill: Council of Planning Librarians, 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMitchell, Bruce, और Joan Elizabeth Mitchell. The Watershed as a Resource Management Unit: A Selected Bibliography. Council of Planning Librarians, 1972.
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