TY - BOOK AU - Williams, G.D...[et.al] TI - Bending properties of Four-layer Nail-laminated posts U1 - 620.12 21st ed PY - 1993/// CY - Madison PB - U.S. Department of Forest product laboratory KW - forest service KW - experimental design KW - long timber N1 - United states department of agriculture, research paper FPL-RP-528 ER -