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Gass, Patrick Lewis and Clarke's Journal to the Rocky Mountains
 Gass, Patrick Lewis and Clarke's Journal to the Rocky Mountains
Gass, Patrick Voyage Des Capitaines Lewis Et Clarke, Depuis L'embouchure Du Missouri, Jusqu'à L'entrée De La Colombia Dans L'océan Pacifique, Fait Dans Les Années 1804, 1805 Et 1806 [...]
 Gass, Patrick Voyage Des Capitaines Lewis Et Clarke, Depuis L'embouchure Du Missouri, Jusqu'à L'entrée De La Colombia Dans L'océan Pacifique, Fait Dans Les Années 1804, 1805 Et 1806 [...]
The Life and Times of Patrick Gass [microform]: Now Sole Survivor of the Overland Expedition to the Pacific Under Lewis and Clark, in 1804-5-6; Also a ... and a Participant in the Battle of Lundy's...
 The Life and Times of Patrick Gass [microform]: Now Sole Survivor of the Overland Expedition to the Pacific Under Lewis and Clark, in 1804-5-6; Also a ... and a Participant in the Battle of Lundy's...
Gass, Patrick Gass's Journal of the Lewis and Clark Expedition
 Gass, Patrick Gass's Journal of the Lewis and Clark Expedition
Jacob, J.G. The Life and Times of Patrick Gass
 Jacob, J.G. The Life and Times of Patrick Gass
Gass, Patrick Lewis and Clark's Journal to the Rocky Mountains in the Years 1804,-5,-6
 Gass, Patrick Lewis and Clark's Journal to the Rocky Mountains in the Years 1804,-5,-6
Gass, Patrick