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 

 Environmental Sciences, Helena. 



Bahls, L.L. 1999. Effects Of An Oil Spill on The Composition 

 and Structure of the Periphyton Community in Casino Creek 

 and Big Spring Creek near Lewistown, Montana. Prepared for 

 the Montana Department of Environmental Quality, Helena, 

 Contract No. 200012. 



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



Biology of Montana Reference Streams. Montana Department of 

 Health and Environmental Sciences, Helena. 



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



1999. Rapid Bioassessment Protocols for Use in Streams and 

 Wadeable Rivers: Periphyton, Benthic Macroinvertebrates and 

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

 of Water, Washington, D.C. 



Dillard, G.E. 1999. Common Freshwater Algae of the United 

 States. J. Cramer, Berlin. 



Johansen, J.R. 1999. Diatoms of Aerial Habitats. Chapter 12 in 

 Stoermer, E.F., and J. P. Smol (eds.), The Diatoms, Cambridge 

 University Press, New York. 



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

 water quality goals. Environmental Management 5:55-69. 



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

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

 H. Heynig, and D. Mollenhauer (eds.). Freshwater Flora of 

 Middle Europe. Gustav Fischer Publisher, New York. 



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. 

 Gustav Fischer Publisher, New York. 



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