"Oregon." . . "California." . . "Travel." . . . . "Pacific Coast (U.S.)" . . "Meteorology Rocky Mountains." . . "Discoveries in geography." . . "United States" . . "United States." . "États-Unis (Ouest)" . . "West (U.S.)" . . "voyage d'exploration Etats-Unis - ouest 1838 / 1854 [document]" . . "United States, West." . . "Astronomy Observations." . . "États-Unis (Ouest) - Descriptions et voyages." . . "Astronomy." . . "Geology Oregon." . . "Rocky Mountains." . . "Pacific States" . . . . . . . . . . . . . . . . . "The expeditions of John Charles Frémont ... Edited by Donald Jackson and Mary Lee Spence"@en . . . . . . . . . . . . . . . . . . . . . . . . "The expeditions of John Charles Fr"@en . . . . "The Expeditions of John Charles Frémont" . "The expeditions of John Charles Fremont" . "Observations" . . "The expeditions of John Charles Frémont"@en . "The expeditions of John Charles Frémont" . . . . "Geology California." . . "Meteorology." . . "Geology." . .