operator's manual Simpson, William Turner 1938- United States Forest Service. text bibliography dcu Washington Forest Service 1991 1991 1961 Rev. August 1991. monographic eng vi, 274 p. ill. 28 cm. general edited by William T. Simpson. Kilns Handbooks, manuals, etc Lumber Drying doc92000326 920205 20160527201146.0 44112