Schmidt, A. R., & Blanchard, S. F. (1997). Surface-water-quality assessment of the upper Illinois River Basin in Illinois, Indiana, and Wisconsin: Results of investigations through April 1992. U.S. Geological Survey.
Chicago Style (17th ed.) CitationSchmidt, A. R., and Stephen F. Blanchard. Surface-water-quality Assessment of the Upper Illinois River Basin in Illinois, Indiana, and Wisconsin: Results of Investigations Through April 1992. Urbana, Illinois: U.S. Geological Survey, 1997.
MLA (9th ed.) CitationSchmidt, A. R., and Stephen F. Blanchard. Surface-water-quality Assessment of the Upper Illinois River Basin in Illinois, Indiana, and Wisconsin: Results of Investigations Through April 1992. U.S. Geological Survey, 1997.
Warning: These citations may not always be 100% accurate.