References
- March 1977 . Sampling and Analysis Procedures for Screening of Industrial Effluents for Priority Pollutants , March , U.S. Environmental Protection Agency Environmental Monitoring and Support Laboratory . Revised April, 1977
- Martin , T.D. , Kopp , J.F. and Ediger , R.D. 1975 . Atomic Absorption Newsletter , 14 (5) : 109 – 116 .
- 1974 . Methods for Chemical Analysis of Water and Wastes , Washington, D.C. : U.S. Environmental Protection Agency, Office of Technology Transfer . EPA‐625‐/6–74–003