- Dickinson, J. J., “Theodore Roosevelt, Press Agent,” Harper's Weekly, 51, September, 1907.
- “The Governors' Conference and a New Patriotic Impulse,” The World's Work, 16:(no. 3), July 1908.
- Johnson, Robert Underwood, Remembered Yesterdays, Little, Brown and Co., Boston, 1923.
- Jordan, William George, The House of Governors, a New Idea in American Politics Aiming to Promote Uniform Legislation on Vital Questions, to Conserve States-Rights, to Lessen Centralization, to Secure a Fuller Freer Voice of the People and to Make a Stronger Nation, Jordan Publishing Company, New York, 1907.
- Loeb, William Jr., to WJ McGee, Social and Economic Records Division, National Archives and Records Service, Washington D. C.
- McGeary, M. Nelson, Gifford Pinchot: Forester-Politician, Princeton University Press, Princeton, New Jersey, 1960.
- Pinchot, Gifford, Breaking New Ground, Harcourt, Brace and Co., New York, 1947.
- Pinchot, Gifford, The Fight for Conservation, Doubleday, Page and Co., New York, 1910.
- Pinchot, Gifford, to C. Grant LaFarge, May 16, 1908, Pinchot papers, Library of Congress.
- Pinchot papers, Library of Congress.
- Shipp, Thomas R., to Gifford Pinchot, April 11, 1907, Pinchot papers, Library of Congress.
Environmental Education
Volume 1, 1970 - Issue 4