Não informado. (1999). Annual report on Ground Water in Arizona. Arizona State Land Department.
Lua i Stíl Chicago (17ú heag.)Não informado. Annual Report on Ground Water in Arizona. Phoenix, Ariz: Arizona State Land Department, 1999.
Lua MLA (8ú heag.)Não informado. Annual Report on Ground Water in Arizona. Arizona State Land Department, 1999.
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