National Performance Audit Program: 1979 Proficiency Surveys for Sulfur Dioxide, Nitrogen Dioxide, Carbon Monoxide, Sulfate, Nitrate, Lead, and High Volume Flow, Volume 1
Berne I. Bennett · Robert L. Lampe · John C. Puzak
Jan 1981 · Environmental Monitoring and Support Laboratory, Office of Research and Development, U.S. Environmental Protection Agency