1930. University of Arizona. Library. Statewide coverage of 1930 Census City Wards for Arizona. Wards were determined from textual description of the boundaries. University of Arizona.
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1940. University of Arizona. Library. Statewide coverage of 1940 Census City Wards for Arizona. Wards were determined from textual descriptions of the boundaries. University of Arizona.
1950. University of Arizona. Library. Statewide coverage of 1950 Census City Wards for Arizona. Wards were determined from textual descriptions of the boundaries. University of Arizona.