Online Books by
Sigurd P. Hansen
Books from the extended shelves:
![[X-Info]](https://onlinebooks.library.upenn.edu/infouc.gif)
Hansen, Sigurd P.: Estimating costs for water treatment as a function of size and treatment efficiency (Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory ;, 1978), also by Robert C. Gumerman, Russell L. Culp, and Municipal Environmental Research Laboratory (page images at HathiTrust)- Hansen, Sigurd P.: Estimating water treatment costs (Cincinnati, Ohio : Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory, 1979., 1979), also by Robert C. Gumerman, Thomas S. Lineck, Russell L. Culp, Culp/Wesner/Culp, and Municipal Environmental Research Laboratory (page images at HathiTrust)
- Hansen, Sigurd P.: Estimating water treatment costs. Volume 3, Cost curves applicable to 2,500 gpd to 1 mgd treatment plants (U.S. Environmental Protection Agency, 1979), also by Russell L. Culp and Robert C. Gumerman (page images at HathiTrust)
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