Books by R. L Duprey:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Duprey, R. L.: Compilation of air pollutant emission factors. (U.S. Environmental Protection Agency, Office of Air and Waste Management, Office of Air Quality Planning and Standards, 1975), also by United States Environmental Protection Agency (page images at HathiTrust)- Duprey, R. L: Compilation of air pollutant emission factors (U.S. Department of Health, Education, and Welfare, Public Health Service, Bureau of Disease Prevention and Environmental Control, National Center for Air Pollution Control, 1968), also by United States. Division of Air Pollution (page images at HathiTrust)
- Duprey, R. L.: Compilation of air pollutant emission factors. (For sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington, 1972), also by United States. Environmental Protection Agency. Office of Air Programs (page images at HathiTrust)
Find more by R. L Duprey at your library, or elsewhere.