(1974). Map showing chemical quality of ground water for public supply in the Tucson area, Arizona. U.S. Geological Survey.
Chicago-Zitierstil (17. Ausg.)Map Showing Chemical Quality of Ground Water for Public Supply in the Tucson Area, Arizona. Reston, Va: U.S. Geological Survey, 1974.
MLA-Zitierstil (9. Ausg.)Map Showing Chemical Quality of Ground Water for Public Supply in the Tucson Area, Arizona. U.S. Geological Survey, 1974.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.