TY  - BOOK
AU  - Walker, Wilfred
AU  - 
TI  - Metallogeny and global tectonics
U1  - 553.1 
PY  - 1976///
CY  - Pennsylvania
PB  - Hutchinson
KW  - Economic geology
KW  - Minerals
KW  - Ores
KW  - metallogeny
ER  -