4 books
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
Colorimetric Determination of Nitrate Plus Nitrite in Water by Enzymatic Reduction, Automated Discrete Analyzer Methods
Automated, Colorimetric Methods for Determination of Nitrate Plus Nitrite, Nitrite, Ammonium and Orthophosphate Ions in Natural Water Samples
Methods of Analysis by the U.S. Geological Survey