Morrison, R.B., 1975, Tucson 1o x 2o quadrangle, ease of excavation and potential erodibility, phases 4 and 5: Arizona Bureau of Geology and Mineral Technology Open-File Report 83-03, 3 p., 1 sheet, scale 1:250,000.
Morrison, R.B., 1975, Tucson 1o x 2o quadrangle, ease of excavation and potential erodibility, phases 4 and 5: Arizona Bureau of Geology and Mineral Technology Open-File Report 83-03, 3 p., 1 sheet, scale 1:250,000.
Engineering, Erosion,