Smith, G.M. 1950. the Fresh-Water Algae of The United States. 

 McGraw-Hill Book Company, New York. 



Stevenson, R.J., and L.L. Bahls. 1999. Periphyton Protocols. 

 Chapter 6 in Barbour, M.T., J. Gerritsen, B.D. Snyder, and 

 J.B. Stribling. 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. 



USDA. 1976. Climax Vegetation of Montana (map). U. S. 



Department of Agriculture, Soil Conservation Service, 

 Cartographic Unit, Portland. 



van Dam, H., A. Mertens, and J. Sinkeldam. 1994. A coded 

 checklist and ecological indicator values of freshwater 

 diatoms from the Netherlands. Netherlands Journal of Aquatic 

 Ecology, 28 (1) : 117-133 . 



Whitford, L.A., and G.J. Schumacher. 1984. A Manual of Fresh- 

 Water Algae (Revised) . Sparks Press, Raleigh, North 

 Carolina. 



Whittaker, R.H. 1952. A study of summer foliage insect 



communities in the Great Smoky Mountains. Ecological 

 Monographs 22:1-44. 



Woods, A.J., Omernik, J.M., Nesser, J. A., Shelden, J., and 



Azevedo, S.H. 1999. Ecoregions of Montana (color poster 

 with map), U.S. Geological Survey, Reston, Virginia. 



13 



