LITERATURE CITED 



APHA. 1998. Standard Methods for the Examination of Water and 

 Wastewater. 20th Edition. American Public Health 

 Association, Washington, D.C. 



Bahls, L.L. 1979. Benthic diatom diversity as a measure of 

 water quality. Proc . Mont. Acad. Sci . 38:1-6. 



Bahls, L.L. 1993. Periphyton Bioassessment Methods for Montana 

 Streams (Revised) . Montana Department of Health and 

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Bahls, L.L., Bob Bukantis, and Steve Tralles . 1992. Benchmark 



Biology of Montana Reference Streams. Montana Department of 

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Bahls, L.L., and P. A. Bahls. 1976. An Algal Survey of Surface 

 Waters in Eastern Montana Suspected to be Influenced by 

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Barbour, M.T., J. Gerritsen, B.D. Snyder, and J.B. Stribling. 



1999. Rapid Bioassessment Protocols for Use in Streams and 

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 Fish. Second Edition. EPA/841-B-99-002 . U.S. EPA, Office 

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Karr, J.R., and D.R. Dudley. 1981. Ecological perspectives on 

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Krammer, K., and H. Lange-Bertalot . 1986. Bacillariophyceae, 

 Part 2, Volume 1: Naviculaceae . In Ettl, H., J. Gerloff, 

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Krammer, K., and H. Lange-Bertalot. 1988. Bacillariophyceae, 

 Part 2, Volume 2: Bacillariaceae, Epithemiaceae, 

 Surirellaceae . In Ettl, H., J. Gerloff, H. Heynig, and D. 

 Mollenhauer (eds.), Freshwater Flora of Middle Europe. 

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Krammer, K., and H. Lange-Bertalot. 1991a. Bacillariophyceae, 

 Part 2, Volume 3: Centrales, Fragilariaceae, Eunotiaceae. 

 In Ettl, H., J. Gerloff, H. Heynig, and D. Mollenhauer 

 (eds.). Freshwater Flora of Middle Europe. Gustav Fischer 

 Publisher, Stuttgart. • 



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