Budd, R. (1931). The Pacific Northwest and the engineer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBudd, Ralph. The Pacific Northwest and the Engineer. [St. Paul, 1931.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBudd, Ralph. The Pacific Northwest and the Engineer. 1931.
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