Title: Trail and commercial pack stock management in the Ansel Adams and John Muir wildernesses
Subjects: Trails, Wilderness areas, Pack animals (Transportation), Nature conservation
Places: John Muir Wilderness (Calif.), California, Ansel Adams Wilderness (Calif.), Ansel Adams Wilderness, Inyo National Forest (Calif. and Nev.), John Muir Wilderness, Sierra National Forest (Calif.)