ISBN 0607926236 books & textbook
Environmental Characteristics and Water Quality of Hydrologic Benchmark Network Stations in the Midwestern United States, 1963-95 (U.S. Geological Survey Circular, 1173-B)
U S Geological Survey /1999-01-01 Paperback / 130 Pages
isbn-10: 0607926236 / isbn-13: 9780607926231
