Search Results for the EPA National Library Catalog

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Select Item	Title	Year Published
1	East Helena Report	1969
2	Evaluation of SO2 Emission Control Technology Applicable to the East Helena Lead Smelter.	1975
3	Full-scale evaluation of activated bio-filter wastewater treatment process {microform} /	1982
4	Helena Valley, Montana, area environmental pollution study.	1972
5	In Situ Source Control of Acid Generation Using Sulfate-Reducing Bacteria.	2008
6	Landfill Gas and Leachate Monitoring: Helena, Montana - A Technical Assistance Panels Program Report.	1981
7	Record of decision : East Helena smelter site process ponds operable unit, East Helena, Montana /	1989

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