The Online Books Page

Books by William T. Engel:

Books in the extended shelves:

• Engel, William T.: Effluent monitoring procedures : basic laboratory skills : staff guide for conducting the course. (Environmental Protection Agency, Office of Water Program Operations, Municipal Operations and Training Division, National Training and Operational Technology Center, 1978), also by National Training and Operational Technology Center (U.S.), David M. Wagner, and John H Highby (page images at HathiTrust)
• Engel, William T.: Field study of nutrient control in a multicell lagoon (Municipal Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency ;, 1980), also by Thomas T. Schwing, Municipal Environmental Research Laboratory, Charles County Community College, and Municipal Environmental Research Laboratory. Wastewater Research Division (page images at HathiTrust)

Find more by William T. Engel at your library, or elsewhere.