Title: Mineral resources of the Fifteen Mile Creek, Oregon Canyon, Twelve Mile Creek, and Willow Creek Wilderness Study Areas, Malheur and Harney counties, Oregon
Subjects: Mines and mineral resources
Places: Oregon Canyon Wilderness (Or.), Willow Creek Wilderness (Or.), Oregon Canyon Wilderness, Oregon, Twelve Mile Creek Wilderness (Or.), Willow Creek Wilderness, Twelve Mile Creek Wilderness, Fifteen Mile Creek Wilderness (Or.), Fifteen Mile Creek Wilderness