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.
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1974. Arizona. State Land Department. Hydro polygon features in the State of Arizona with an emphasis on lakes, ponds and reservoirs. This polygon cover consists of all the lakes and bo... Arizona State Land Department.
1974. This polygon cover consists of all the lakes in Arizona. Digitized from the 1:500,000 scale, 'Hydrologic Unit Map - 1974. Arizona State Land Department.