Daniels, J. (1914). The coal fields of Pierce County. F.M. Lamborn, public printer.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDaniels, Joseph. The Coal Fields of Pierce County. Olympia: F.M. Lamborn, public printer, 1914.
एमएलए (8वां संस्करण) प्रशस्ति पत्रDaniels, Joseph. The Coal Fields of Pierce County. F.M. Lamborn, public printer, 1914.
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