TY  - BOOK
AU  - Beringer, Cornelius,
AU  - Beringer, John Jacob,
TI  - A text-book of assaying: For the use of those connected with mines 
AV  - TN550 B47 1895
PY  - 1895///
CY  - London
PB  - Griffin
KW  - Ensayos
ER  -