Books by Alan B Hais:
Books in the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Hais, Alan B: Alum addition to activated sludge with tertiary solids removal (For sale by the Supt. of Docs., U.S. Govt. Print. Off., 1973), also by United States. Environmental Protection Agency. Office of Research and Monitoring (page images at HathiTrust)- Hais, Alan B.: System alternatives in oxygen activated sludge (Cincinnati, Ohio : National Environmental Research Center, Office of Research and Development, U.S. Environmental Protection Agency, [1975], 1975), also by John B. Stamberg, Stephen M. Bennett, Dolloff F. Bishop, District of Columbia. Department of Environmental Service, Ohio) National Environmental Research Center (Cincinnati, and United States. Environmental Protection Agency. Office of Research and Development (page images at HathiTrust)
Find more by Alan B Hais at your library, or elsewhere.