TY - RPRT TI - Environmental characteristics and water quality of hydrologic benchmark network stations in the Midwestern United States, 1963-95 AU - M. Alisa Mast AU - John T. Turk PY - 1999 DO - 10.3133/cir1173b UR - https://pubs.usgs.gov/publication/cir1173B ID - cir1173B ER -