Effects of the eruptions of Mount St. Helens on physical, chemical, and biological characteristics of surface water, ground water, and precipitation in the western United States

by Lee, Douglas B.
Published: U.S. G.P.O. ; For sale by the U.S. Geological Survey, Information Services, 1996

Water-quality data for the South Umpqua River Basin, Oregon, 1990-92

by Anderson, Chauncey W.
Published: U.S. Dept. of the Interior, U.S. Geological Survey ; Earth Science Information Center, Open-File Reports Section [distributor], 1994