TY  - BOOK
AU  - Coffman,Joseph S.
ED  - United States.
TI  - Manganese availability--market economy countries: 1980's perspective 
T2  - Information circular
PY  - 1992///
CY  - Washington, D.C.
PB  - U.S. Dept. of the Interior, Bureau of Mines
KW  - Manganese industry
KW  - Manganese mines and mining
ER  -