TY - RPRT TI - Distribution of copper in heavy-mineral-concentrate samples from the Charlotte 1° x 2° quadrangle, North Carolina and South Carolina AU - W. R. Griffitts AU - J. W. Whitlow AU - K.A. Duttweiler AU - D. F. Siems AU - Theodore Botinelly PY - 1985 DO - 10.3133/ofr84843b UR - https://pubs.usgs.gov/publication/ofr84843B ID - ofr84843B ER -