T. J. Crawford F. G. Lesure A. E. Nelson J. N. Grossman M. W. Doughten Norma Rait Lucy McCartan R. F. Crawford III J.H. Medlin David Gottfried R.B. Cook Jr. R.P. Sanders K.A. Gillon M. W. Higgins 1992 application/pdf 10.3133/ofr92220 en A preliminary geochemical evaluation of potential for platinum deposits in the crystalline rocks of Georgia reports