Lake States Aspen Report No. 2
U.S. Dept. of Agriculture, Forest Service, Lake States Forest Experiment Station
A knowledge of the total and available supply of aspen is basic to a study of the aspen situation. Hence, this paper aims to show the relative position of aspen2/ as a commercial forest type in the Lake States region, both currently and potentially. The data on areas, volumes, and growth are taken from the Forest Survey made in 1933-37, brought up to January 1, 1945, by office calculations including drain studies. Areas by site quality, allowable cut calculations, and volumes of timber available (1945 to I960) are the best estimates that can be made at this time.
Chase, Clarence D. 1947. Aspen availability and supply. United States department of Agriculture.