Washington (State). Department of Highways. (1960). Historical markers. s.n..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington (State). Department of Highways. Historical Markers. [Washington (State): s.n., 1960.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington (State). Department of Highways. Historical Markers. s.n., 1960.
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