Thomas Cooper, Albuquerque, New Mexico, to Eliot Porter. November 17, 1971.

Sierra Club Publications Sales and Inventory Report No. C-237. July 31, 1972.

"Esoteric Collector's Baedeker" by Rita Reif in The New York Times. November 24, 1973.

New Mexico Chapter of the Nature Conservancy Board of Trustees Meeting Minutes. January 28, 1984.

Joseph Krutch, Tucson, Arizona, to Eliot Porter. July 24, 1953.

Joseph Wood Krutch, Tucson, Arizona, to Eliot Porter. July 5, 1953.

David H. McAlpin, Clark, Dodge & Co., New York, New York, to Eliot Porter. January 21, 1941.

David Shenkman, Denver, Colorado, to Eliot Porter. January 4, 1971.

Eliot Porter to Brigitte Barkley, GEO Magazine. May 18, 1980.

Eliot Porter to Senator Fred A. Gross, Jr. March 24, 1972.

Pam [Beerer?], Albuquerque, New Mexico, to Eliot Porter. October 11, 1979.

John Merrill Christiansen, Cambridge, Massachusetts, to Eliot Porter. November 6, 1968.

Anonymous, Santa Fe, New Mexico, to Eliot Porter. February 22, 1960.

Jim Bones, Austin, Texas, to Eliot Porter. April 14, 1972.

G. S. Borit, Cambridge, Massachusetts, to Eliot Porter. November 10, 1967.

Dennis Brokaw, San Diego, California, to Eliot Porter. July 3, 1969.

Wytter Bynner, Chapala, Jalisco, Mexico, to Eliot Porter. January 28, 1961.

David Canfield, Hillsdale, Michigan, to Eliot Porter. April 6, 1979.

John Branch, South Gate, California, to Eliot Porter. March 22, 1979.

Bill Rosinger, Hirsch Photo, Ltd., New York, New York, to Eliot Porter. July 28, 1979.