MLA

Products Laboratory (U.S.), Forest, et al. Supplement to Design of Plywood Webs In Box Beams : Additional Tests of Box Beams and I-beams to Substantiate Further the Design Curves for Plywood Webs In Box Beams -- Tests of Plywood Webs In the Tension Field. : Madison, Wis. : U.S. Dept. of Agriculture, Forest Service, Forest Products Laboratory, 1960.