1940. University of Arizona. Library. Statewide coverage of 1940 Census County Subdivisions (Minor Civil Divisions). University of Arizona.
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1950. University of Arizona. Library. Statewide coverage of 1950 Census County Subdivisions. University of Arizona.
1960. University of Arizona. Library. Statewide coverage of 1960 Census County Subdivisions. 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.
1961. National Climatic Data Center (U.S.). This element was computed using snowfall data from the National Climatic Data Center's United States Snow Climatology (TD-9641M) database (NCDC, 19... National Climatic Data Center (U.S.).
2003. This data represents the locations of earth fissures in central and southeastern Arizona. Earth fissures are pervasive cracks found on valley floor... Arizona Geological Survey.
1994. These data sets consist of the School Districts in Arizona by county. Arizona State Land Department.
1993. Arizona. State Land Department. Dataset identifies both Ephemeral and Perennial Streams throughout Arizona. This dataset was converted in the fall of 1988 from USGS 1:100,000 scal... Arizona State Land Department, Arizona Land Resources Information System.
1990. Arizona. Department of Health Services. Depiction of Firearm related deaths by county in Arizona. Incidence rate is per 100,000 persons. Arizona Department of Health Services.