TY - REP AU - Wenberg,R.D. AU - Talbot,J.R. TI - USDA Soil Conservation Service criteria for subsurface drain filters or envelopes SN - 09-161-50887 U1 - 89-110987 PY - 1987/// KW - America KW - Drainage KW - Engineering KW - Environment KW - Equipment KW - Hydraulic engineering KW - Methods KW - North America KW - Site factors KW - Soil management N1 - referDEes T2 - Drainage design and management : proceedings of the Fifth National Drainage Symposium, December 14-15, 1987, Hyatt RegDEy Chicago in Illinois Center. St. Joseph, Mich. (USA). American Society of Agricultural Engineers. 1987. p. 424-431 ER -