(1973). Map showing distribution of recoverable ground water in the Tucson area, Arizona. U.S. Geological Survey.
Chicago-Zitierstil (17. Ausg.)Map Showing Distribution of Recoverable Ground Water in the Tucson Area, Arizona. Washington, D.C: U.S. Geological Survey, 1973.
MLA-Zitierstil (9. Ausg.)Map Showing Distribution of Recoverable Ground Water in the Tucson Area, Arizona. U.S. Geological Survey, 1973.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.