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2. Experimental measurements and empirical modelling of the regional deposition of inhaled particles in humans;Chan;Am. ind. hyg. Ass. J.,1980
3. National primary and secondary ambient air standards, Appendix B, Reference method for the determination of suspended particulate in the atmosphere;Federal Register;Fed. Reg.,1971
4. Summary of PM-15 data differences available from collocated field samplers from June 1979 through June 1982;Hinton;Internal EPA report 7/28/83,1983
5. The effect of exposure of filters during non-operating periods in the high volume sampling method;Lizarrago-Rocha,1976