Series 1. Correspondence 1953-1973
Correspondence with trustees 1954-1973
General correspondence 1955-1960
General correspondence 1965-1973
Inquiries (public) 1972
Audubon Society 1961-1963
Brooks, Paul 1968-1969
Crawford, Hilary H. 1971-1973
Dinosaur National Monument/ Echo Park Dam project (1 of 2) 1953-1956
Dinosaur National Monument/ Echo Park Dam project (2 of 2) 1953-1956
Jukes, Thomas H. 1969-1972
National Parks Association (correspondence and documents) 1955-1964
Sierra Club 1960-1972
Sierra Club snow forecast- Weldon F. Heald 1954-1961
The Wilderness Society 1953-1964
Zahniser, Howard 1957-1962
Zimmermann, William Jr. 1958-1967
Series 2. Administrative materials 1954-1975
Meeting minutes, bylaws, articles of incorporation 1954-1972
Annual meeting minutes 1955-1972
Executive Committee meeting minutes and correspondence 1955-1972
Lists of trustees and terms 1954-1975
Lobby registration and reports 1957-1972
Bills and invoices 1958-1973
Tax forms 1954-1972
Financial reports, bank statements 1957-1973
Fund appeal 1961-1965
Contributions (financial) 1956-1957
Thank you letters to contributors 1955-1962
Mailing permits 1955-1963
Printing order and stationery 1955-1960
Series 3. Program records and publicity materials 1951-1974
Mailers 1955-1971
News releases 1955-1962
Articles about William Losh 1957-1973
Alaska Conservation Review and other newsletters 1971-1973
Arizonans for Quality Environment (formerly Arizonans for Water Without Waste) newsletters and correspondence 1967-1972
California State Parks 1960-1964
California State Park system circa 1954
California Wilderness Areas/ Wilderness Policy 1961-1971
Council of Conservationists- correspondence and documents about Colorado River 1955-1957
Conservation Associates/ Sempervirens Fund 1962-1973
Dinosaur National Monument/ Echo Park Dam project 1953-1955
Eel River Water Basin- dam projects 1967-1968
Everglades National Park, Canal- III 1967
Federation of Western Outdoor Clubs- correpsondence and briefs 1955-1972
Fort Point Historical Monument 1960-1961
Friends of the Earth- mailers 1970-1971
Great Basin National Park Association 1955-1960
The Nature Conservancy circa 1960-1965
Open Space/ People for Open Space/ San Francisco Bay Shoreline 1959-1968
Point Reyes National Seashore 1960-1964
Sierra Club- National News Report (weekly newsletters) 1973
Sierra Club public relations primer (prepared by William Losh) 1974
Wilderness Bill- correspondence 1957-1963
Wilderness Bill- Congressional Record 1956-1964
Wilderness Bill- clippings 1956-1964
Wilderness Bill- statements, plans, and publications 1953-1964
Wilderness hearings under Wilderness Act (Wilderness Society material) 1966-1967
Second and Third Biennial Wilderness Conferences 1951-1953
Fourth Biennial Wilderness Conference 1954-1955
Eight Biennial Wilderness Conference 1963
Ninth Biennial Wilderness Conference 1965
Tenth Biennial Wilderness Conference 1967
Various conservation projects 1955-1972