1. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : arsenic speciation in natural-water samples using laboratory and field methods Author/Creator: Garbarino, John R. Publication/Creation: Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
2. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of pesticides in water by graphitized carbon-based solid-phase extraction and high-performance liquid chromatography/mass spectrometry Publication/Creation: Denver, Colo. : U.S. Dept. of the Interior, U.S. Geological Survey, 2001 Resource Type: Book Access & Availability: Loading
3. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory : determination of wastewater compounds by polystyrene-divinylbenzene solid-phase extraction and capillary-column gas chromatography/mass spectrometry Publication/Creation: Denver, CO : National Water Quality Laboratory, U.S. Geological Survey, 2002 Resource Type: Book Access & Availability: Loading
4. Microbiological water quality in relation to water-contact recreation, Cuyahoga River, Cuyahoga Valley National Park, Ohio, 2000 and 2002 Author/Creator: Bushon, Rebecca N. Publication/Creation: Reston, Virginia : U.S. Geological Survey ; Denver, Colo. : U.S. Geological Survey, Information Services, 2004 Resource Type: Book Access & Availability: Loading