1. Quality of water from public-supply wells in principal aquifers of Illinois, 1984-87 Author/Creator: Voelker, David C., author Publication/Creation: Urbana, Illinois : U.S. Geological Survey, [1989] Format: Book Access & Availability: Loading
2. Quality-assurance data for routine water analysis in the laboratories of the U.S. Geological Survey for water year 1986 Author/Creator: Lucey, Keith J., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1989 Format: Book Access & Availability: Loading
3. Quality-assurance data for routine water analysis in the National Water-Quality Laboratory of the U.S. Geological Survey for water year 1987 Author/Creator: Lucey, Keith J., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1989 Format: Book Access & Availability: Loading
4. Quality-assurance data for routine water analysis in the National Water-Quality Laboratory of the U.S. Geological Survey for water year 1988 Author/Creator: Lucey, Keith J., author Publication/Creation: Denver, Colorado : U.S. Geological Survey, 1989 Format: Book Access & Availability: Loading