Lake States Aspen Report No. 17
U.S. Dept. of Agriculture, Forest Service, Lake States Forest Experiment Station
Because of the great demand for wood fiber and because there is an abundance of aspen available1/ for this purpose, its conversion into a usable fiberized material offers possibilities. It also affords an outlet for low-quality bolts developed in any aspen logging operation or from land of poor quality.
Craig, Robert Jr., "Aspen Defiberization and Refining of Product" (1948). Aspen Bibliography. Paper 7795.