TY  - BOOK
AU  - Cox,Dennis P.
AU  - Wright,Nancy A.
AU  - Coakley,George J.
ED  - United States
TI  - The nature and use of copper reserve and resource data
U1  - 553.430973 
PY  - 1981///
CY  - Washington, D.C
PB  - United States Government Printing Office
KW  - Copper ores
KW  - United States
KW  - Geology
KW  - Survey
N1  - Bibliography: p. 19-20
ER  -