1. Geology and ore deposits of the Dragoon Quadrangle, Arizona;Cooper;U.S. Geol. Surv., Prof. Pap.,1964
2. The geology of the Organ Mountains;Dunham;N.M. Bur. of Mines, Resour., Bull.,1935
3. Differential secondary dispersion in transported soils and post mineralization rocks: an electrochemical interpretation;Govett,1973
4. The homogeneous chemistry of atmospheric sulphur;Graedel;Rev. Geophys. Space. Phys.,1977
5. Gases and trace elements in soils at the North Silver Bell deposit, Pima County Arizona;Hinkle;J. Geochem. Explor.,1984