1. Modified factor analysis of selected RAPS aerosol data;Alpert;Final report to the Environmental Protection Agency,1980
2. A quantitative determination of sources in the Boston urban aerosol;Alpert;Atmospheric Environment,1980
3. Multivariate Error Analysis;Clifford,1973
4. Controlling Airborne Particles;Commission on Natural Resources, National Research Council,1979
5. Analysis of carbonaceous particulates and characterization of their sources by low-level radiocarbon counting and pyrolysis/gas chromatography/mass spectrometry;Currie,1978