Idaho Dept. of Highways in cooperation wit the U.S. Dept. of Commerce, Bureau of Public Roads,
Idaho State Historical Society.
978.0838 OREGON ROUTE IDAHO_1974+
Route of the Oregon Trail in Idaho : from Thomas Fork Valley at the Wyoming State Line westward to Fort Boise at the Oregon State Line.
Route of the Oregon Trail in Idaho : from Thomas Fork Valley at the Wyoming State Line westward to Fort Boise at the Oregon State Line.
Route of the Oregon Trail in Idaho :
Idaho State Historical Society.