TY  - BOOK
AU  - Winchell, Alexander N.
TI  -  Elements of optical mineralogy: :An introduction to microscopic petrography part II-description of minerals
U1  - 549.12 
PY  - 1968///
CY  - New Delhi
PB  - Wiley eastern 
KW  - Elements of optical mineralogy
KW  - Multiple sulfides
KW  - Elements of metallic bonding
ER  -