Spokane County Conservation District (Wash.). (1990). Urban forest. Spokane Conservation District.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpokane County Conservation District (Wash.). Urban Forest. [Spokane, WA]: Spokane Conservation District, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpokane County Conservation District (Wash.). Urban Forest. Spokane Conservation District, 1990.
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