TY - RPRT TI - Percentile distributions of median nitrite plus nitrate as nitrogen, total nitrogen, and total phosphorus concentrations in Oklahoma streams, 1973-2001 AU - Brian E. Haggard AU - Jason R. Masoner AU - Carol Becker PY - 2003 DO - 10.3133/wri034084 UR - https://pubs.usgs.gov/publication/wri034084 ID - wri034084 ER -