MLA

Englerth, George H. (George Henry), 1907-1991, et al. The Significance of the Discolorations In Aircraft Lumber : Noble Fir and Western Hemlock. : Madison, Wis. : United States Dept. of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering, Division of Forest Pathology, in cooperation with the Forest Products Laboratory, Forest Service, 1945.