Online Books by
Donald L. Hey
Books from the extended shelves:
- Hey, Donald L.: Creation of wetland habitats in northeastern Illinois (Illinois Dept. of Energy and Natural Resources, 1982), also by Illinois. Dept. of Energy and Natural Resources (page images at HathiTrust)
- Hey, Donald L.: An economic analysis of effluent standards for BOD, ammonia, total suspended solids, and disinfection : case study of a modern treatment plant (State of Illinois, Institute of Natural Resources, Environmental Management Division, 1980), also by Lawrence C. Cox, James M. Pappas, and Illinois Institute of Natural Resources (page images at HathiTrust)
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