Wheat, C. I. (1954). Mapping the American West, 1540-1857: A preliminary study. American Antiquarian Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWheat, Carl I. Mapping the American West, 1540-1857: A Preliminary Study. Worcester, Mass.: American Antiquarian Society, 1954.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWheat, Carl I. Mapping the American West, 1540-1857: A Preliminary Study. American Antiquarian Society, 1954.
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