Frémont, J. C. (1849). The exploring expedition to the Rocky Mountains, Oregon and California: To which is added a description of the physical geography of California, with recent notices of the gold region from the latest and most authentic sources. Buffalo, NY: G.H. Derby.

Frémont, John Charles. The Exploring Expedition to the Rocky Mountains, Oregon and California: To Which Is Added a Description of the Physical Geography of California, With Recent Notices of the Gold Region From the Latest and Most Authentic Sources. Buffalo, NY: G.H. Derby, 1849.

Frémont, John Charles. The Exploring Expedition to the Rocky Mountains, Oregon and California: To Which Is Added a Description of the Physical Geography of California, With Recent Notices of the Gold Region From the Latest and Most Authentic Sources. Buffalo, NY: G.H. Derby, 1849.