Phosphate Occurrence and Potential in the Region of ...
Phosphate Occurrence and Potential in the Region of Afghanistan, Including Parts of China, Iran, Pakistan, Tajikistan, Turkmenistan, and Uzbekistan By Orris, Pamela Dunlap, and John C. Wallis . With a section on geophysics by Jeff Wynn . OpenFile Report 2015–1121 . Department of the Interior . Geological Survey