TY - RPRT TI - Concentrations, distribution, and sources of selenium from irrigated lands in western United States AU - R. A. Engberg AU - M. A. Sylvester PY - 1993 DO - 10.1061/(asce)0733-9437(1993)119:3(522) UR - https://pubs.usgs.gov/publication/70243608 ID - 70243608 ER -