Gulick, L. H. (1951). American forest policy: A study of government administration and economic control. New York: Institute of Public Administration.
Παραπομπή Chicago StyleGulick, Luther Halsey. American Forest Policy: A Study of Government Administration and Economic Control. New York: Institute of Public Administration, 1951.
Παραπομπή MLAGulick, Luther Halsey. American Forest Policy: A Study of Government Administration and Economic Control. New York: Institute of Public Administration, 1951.
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