Joseph Krutch, Tucson, Arizona, to Eliot Porter. November 21, 1953.

Costa Rica: Country Profile, The National Conservancy International Program. January, 1982.

The Nature Conservancy New Mexico Chapter Newsletter, Vol. 5, Number 3. 1983.

Beaumont Newhall, Albuquerque, New Mexico, to Eliot Porter. July 8, 1974.

Beaumont Newhall, Rochester, New York, to Eliot Porter. December 23, 1954.

Karl Struss to Mother. May 8, 1918.

Elaine Yaker, The Pierce Street Gallery, Birmingham, Michigan, to Carlotta Corpron. February 5, 1982.

Mother to Karl Struss. October 26, 1917.

Lilian to Karl Struss. October 30, 1917.

U.S. Policies on Barrier Islands Often Hurt Them, a Study Finds by Bayard Webster. March 18, 1980.

Review of "Let's Save Antartica" by Heather Anderson in New Idea. April 12, 1982.

Ethel to Mother. March 10, [1921].

Ethel to Mother. March 1, 1921.

Karl Struss to Mother. August 19, 1918.

Karl Struss to Mother. August 26, 1918.

World Wildlife Fund Special Offer Order Form for "Let's Save Antartica!" n.d.

Eliot Porter, to Robert Flieder, Chief Engineer, Berkey Technical. December 30, 1968.

Steve King, Earth Art Works, Alameda, California, to Eliot Porter. March 24, 1983.

Action Stopping, High Power Ascorlight for Bird Photography. June 18, 1962.

Annie Bishop, Chicago, Illinois, to Eliot Porter. October 2, 1967.