Trends in precipitation chemistry in the United States, 1983-94 : an analysis of the effects in 1995 of Phase I of the Clean Air Act Amendments of 1990, Title IV / by James A. Lynch, Van C. Bowersox, and Jeffrey W. Grimm, principal investigators. [electronic resource]
Imprint
College Station, Pa. : U.S. Geological Survey ; Denver, CO : Information Services [distributor], 1996.