1. Analytical properties of some commercially available nitrate reductase enzymes evaluated as replacements for cadmium in automated, semiautomated, and manual colorimetric methods for determination of nitrate plus nitrite in water Author/Creator: Patton, Charles J., author Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 2013 Resource Type: Book Access & Availability: Loading
2. U.S. Geological Survey nutrient preservation experiment : experimental design, statistical analysis, and interpretation of analytical results Author/Creator: Patton, Charles J., author Publication/Creation: Denver, Colorado U.S. Geological Survey, U.S. Dept. of the Interior, 1999 Resource Type: Book Access & Availability: Loading