TY  - BOOK
AU  - Beyschlag,Franz Heinrich August
TI  - The deposits of the useful minerals & rocks : : their origin, form, and content  / 
U1  - 553.1 
PY  - 1916///
CY  - London : 
PB  - Macmillan , 
KW  - Mines and mineral resources
KW  - deposits
KW  - Ore
ER  -