Davis, Richard C. (编). Appendix I. National Forests of the United States(PDF). Encyclopedia of American Forest and Conservation History, Volume 2. MacMillan Publishing Company for the Forest History Society: 743–788. 1983 [2017-10-19]. (原始内容(PDF)存档于2013-02-21).
Davis, Richard C. (编). Appendix I. National Forests of the United States(PDF). Encyclopedia of American Forest and Conservation History, Volume 2. MacMillan Publishing Company for the Forest History Society: 743–788. 1983 [2017-10-19]. (原始内容(PDF)存档于2013-02-21).