Simulation of nutrient loss from soils due to rainfall acidity /

Bibliography: p. 43-44.

Analysis of the sulfur content of Illinois streams, with emphasis on contributions from the atmosphere /

Cover title.

Illinois climate : trends, impacts, and issues : proceedings of the 12th Annual ENR Conference, September 13-14, 1983, Urbana-Champaign, Illinois /

"March 1984."

Clean Air Act Amendments of 1989 : hearing before the Subcommittee on Environmental Protection of the Committee on Environment and Public Works, United States Senate, One Hundred First Congress, first session ...

Item 1045-A, 1045-B (MF)