Quality-assurance results for routine water analyses in U.S. Geological Survey laboratories, water year 1998

by Ludtke, Amy S.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : Information Services [distributor], 2000

Quality-assurance results for routine water analyses in U.S. Geological Survey laboratories, water year 1997

by Ludtke, Amy S.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : Information Services [distributor], 1999

Quality-assurance results for routine water analyses in U.S. Geological Survey laboratories, water year 1998

by Ludtke, Amy S.,
Published: U.S. Geological Survey, 2000

USGS blind sample project : monitoring and evaluating laboratory analytical quality

by Ludtke, Amy S.
Published: Branch of Quality Systems, U.S. Dept. of the Interior, U.S. Geological Survey, 1997

Quality-assurance data for routine water analysis in the laboratories of the U.S. Geological Survey for water year 1990

by Maloney, Thomas J.
Published: U.S. Geological Survey : Earth Science Information Center, Open-File Reports Section [distributor], 1993

Quality-assurance results for routine water analysis in U.S. Geological Survey laboratories, water year 1991

by Maloney, Thomas J.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : Earth Science Information Center, Open-File Reports Section [distributor], 1994

Quality-assurance data for routine water analysis in the laboratories of the U.S. Geological Survey for water year 1990

by Maloney, Thomas J.,
Published: U.S. Geological Survey, 1993

Estimates of inorganic nitrogen wet deposition form precipitation for the conterminous United States, 1955-84

by Gronberg, JoAnn M.,
Published: U.S. Department of the Interior, U.S. Geological Survey, 2014