The Wilderness Act of 1964 established a National Wilderness Preservation System, & this report is a compilation of info. about every wilderness within this System. For each wilderness, the following info. is given: legally correct wilderness name; public law (PL) that established the wilderness; date the enabling law was signed by the Pres.; acreage designated in the enabling PL; modifying PL that affected the name, boundary, or administration; current total acreage reported, the agency or agencies with current administrative authority; administering unit or units within the agency; & the State in which the wilderness is located.

The Wilderness Concept and the Three Sisters Wilderness is a guide to understanding the Three Sisters Wilderness as wilderness -- its natural and cultural history as well as the philosophical, legal, and management concepts that keep it a wilderness.

Finds in the history of Denver's Conservation Library a microcosm of the growth of the environmental movement as a whole.