North American forest research. : Investigative projects in forestry and allied subjects / conducted by national, state, and provincial governments, schools of forestry, scientific schools, and private interests in Canada, Newfoundland, and the United States for 1919-1920. Compiled by the Committee on American Forest Research, Society of American Foresters. Earle H. Clapp, Chairman, Clyde Leavitt, Walter Mulford, J. W. Toumey, E. A. Zeigler.
- Washington, D.C. : Published by the National Research Council of the National Academy of Sciences, 1920.
-300 p. ; cm.
- National Research Council (U.S.). Bulletin ; no. 4 (v. 1, pt. 4) Aug. 1920.
National Research Council (U.S.) Bulletin ; no. 4 (v. 1, pt. 4) Aug. 1920