Changnon, Stanley A., Jr.; Davis, Ray J.; Farhar, Barbara C.; Haas, J. Eugene; Ivens, J. Loreena; Jones, Martin V.; Klein, Donald A.; Mann, Dean; Morgan, Griffith M., Jr.; Sonka, Steven T.; Swanson, Earl R.; Taylor, C. Robert; van Blokland, Jon (Illinois State Water Survey, 1977)