TY  - BOOK
AU  - Rickard T A
TI  - History of American mining
T2  - History of American economy : Studies and Materials for study
U1  - X9(HZ).73.N3, G2 
PY  - 1932///
CY  - New York
PB  - Mcgraw-hill USA        
KW  - Minings
N1  - Reprinted : New York, Johnson Reprint corporation, 1966)
ER  -