"Challis Planning Unit." . . "United States. Bureau of Land Management. Idaho State Office." . . "Grazing districts Idaho Challis." . . "Range management Idaho Challis." . . "Challis Planning Unit (Idaho)" . . . . . . . . "Final environmental impact statement, proposed domestic livestock grazing program for the Challis Planning Unit"@en . . . . . . . "Proposed domestic livestock grazing program for the Challis Planning Unit" . "Proposed domestic livestock grazing program for the Challis Planning Unit"@en . . . . . "Proposed domestic livestock grazing program for the Challis planning unit : final environmental statement"@en . . . . . . . .