1. National Primary Drinking Water Regulations: Filtration, Disinfection, Turbidity, Giardia lamblia, Virus, Legionella, and Heterotrophic Bacteria;USEPA;Fed. Reg.,1989
2. National Primary Drinking Water Regulations: Enhanced Surface Water Treatment Rule;USEPA;Fed. Reg.,1994
3. Region 18, Alluvial Valley;Rosenshein,1988
4. Groundwater Resources of Natrona County, Wyoming;Christ,1972
5. Ecology of the Alluvial Aquifers of the Flathead River, Montana;Stanford,1994