1. Population distribution, urban and rural, in the United States: 1970 Author/Creator: United States. Bureau of the Census Publication/Creation: Washington, D.C. U.S. Government Printing Office, 1973 Format: Map Access & Availability: Loading
2. Precipitation-frequency atlas of the Western United States Author/Creator: Miller, John F. 1928- (John Frederick), creator Publication/Creation: Silver Spring, Maryland : U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Weather Service, 1973 Format: Map Access & Availability: Loading