West, C. V. (1993). Capitalism on the frontier: Billings and the Yellowstone Valley in the nineteenth century. University of Nebraska Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWest, Carroll Van. Capitalism on the Frontier: Billings and the Yellowstone Valley in the Nineteenth Century. Lincoln: University of Nebraska Press, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWest, Carroll Van. Capitalism on the Frontier: Billings and the Yellowstone Valley in the Nineteenth Century. University of Nebraska Press, 1993.
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