TY - BOOK AU - Donnan, William W. AU - Bradshav, George B. TI - Report on drainage investigation in irrigated areas of Imperial Valley, Calif.., 1941-51; a to 10-year summary T2 - Bulletin SCS-TP-120 U1 - 631.4 PY - 1954/// CY - Washington PB - U.S. Department of Agriculture Soil Conservation Sevice KW - Drenaje N1 - Enc. con otro impreso similar ER -