MLA

Products Laboratory (U.S.), Forest, and 1904- Blew. Study of the Preservative Treatment of Lumber (a Comparison of the Results of Treatment, by Pressure and Nonpressure Processes, On End-matched Douglas-fir and Shortleaf Pine Lumber). : Madison, Wis. : U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1955.