1970. University of Arizona. Library. Statewide coverage of 1970 American Indian Reservations. Boundaries that cross into the adjacent states are included. Population data is from the U... University of Arizona.
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1970. University of Arizona. Library. Statewide coverage of 1970 Places based on population data available from the U.S. Bureau of the Census. Population data is from the 1970 Census of... University of Arizona.
1970. University of Arizona. Library. Statewide coverage of 1970 Census County Subdivisions. University of Arizona.
1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, and 1990. This element was computed using snowfall data from the National Climatic Data Center's United States Climatology database. The extreme date is the ... National Oceanic and Atmospheric Administration.