TY  - BOOK
AU  - Winchell, Alexander N.
TI  - Elements of optical mineralogy part 1/ 5th ed
U1  - 549.12 
PY  - 1965///
CY  - New york
PB  - John willey &sons
KW  - Elements of optical mineralogy
KW  - Chemical characters of minerals
KW  - Isotropic minerals
ER  -