Frémont, J. C., & Preuss, C. Topographical map of the road from Missouri to Oregon: Commencing at the mouth of the Kansas in the Missouri River and ending at the mouth of the Wallah Wallah in the Columbia.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFrémont, John Charles, और Charles Preuss. Topographical Map of the Road from Missouri to Oregon: Commencing at the Mouth of the Kansas in the Missouri River and Ending at the Mouth of the Wallah Wallah in the Columbia. n.p.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFrémont, John Charles, और Charles Preuss. Topographical Map of the Road from Missouri to Oregon: Commencing at the Mouth of the Kansas in the Missouri River and Ending at the Mouth of the Wallah Wallah in the Columbia.
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