Ryan, J. C. (1994). State of the Northwest. Northwest Environment Watch.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रRyan, John C. State of the Northwest. Seattle, Wash.: Northwest Environment Watch, 1994.
एमएलए (8वां संस्करण) प्रशस्ति पत्रRyan, John C. State of the Northwest. Northwest Environment Watch, 1994.
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