David Evans and Associates & Washington Water Power Company. (1991). Lower Spokane River project comprehensive recreation plan: Draft. David Evans & Associates.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDavid Evans and Associates और Washington Water Power Company. Lower Spokane River Project Comprehensive Recreation Plan: Draft. Spokane, Wash.: David Evans & Associates, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDavid Evans and Associates और Washington Water Power Company. Lower Spokane River Project Comprehensive Recreation Plan: Draft. David Evans & Associates, 1991.
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