TY - RPRT TI - Water quality data at selected sites in the Mississippi Valley-type Zn-Pb ore district of upper Silesia, Poland, 1995-97 AU - Laurie Wirt AU - Jacek Motyka AU - David Leach AU - Maria Sass-Gustkiewicz AU - Marek Szuwarzynski AU - Zbigniew Adamczyk AU - Paul Briggs AU - Al Meiers PY - 2003 DO - 10.3133/ofr01283 UR - https://pubs.usgs.gov/publication/ofr01283 ID - ofr01283 ER -