Turner, R.M., 1974, Map showing vegetation in the Tucson area, Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-844-H, 1 sheet, scale 1:250,000.
Turner, R.M., 1974, Map showing vegetation in the Tucson area, Arizona: U.S. Geological Survey Miscellaneous Investigations Series Map I-844-H, 1 sheet, scale 1:250,000.
Biogeology,