Inquiry into the preparation of the East River Unit Plan, Gunnison National Forest, Colorado : hearings before the Subcommittee on the Environment and Land Resources of the Committee on Interior and Insular Affairs, United States Senate, Ninety-fourth Congress, second session on legislative oversight hearings on the preparation of the East River Unit Plan, Gunnison National Forest, Colorado ; the treatment afforded therein to the proposal of the Crested Butte Development Corporation to expand the crested butte ski area ; and the implications of this planning process for S. 2125, a bill to provide for the issuance of permits on public domain National Forest lands for commercial outdoor recreation facilities and activities, April 8, 9, 10, 12, May 13 and 14, 1976.