TY - RPRT TI - Compilation of data collected and derived for water years 1980 and 1981 for the purpose of water-quality modeling of the lower Ouachita River and selected tributaries, south-central Arkansas AU - J. C. Petersen AU - E. E. Morris PY - 1984 DO - 10.3133/ofr84727 UR - https://pubs.usgs.gov/publication/ofr84727 ID - ofr84727 ER -