TY  - BOOK
AU  - Winchell, Alexander N.
TI  - Elements of optical mineralogy : : An introduction to microscopic petrography
U1  - 549.12 
PY  - 1964///
CY  - Amsterdam
PB  - Neudrack publisheres
KW  - Physical mineralogy
KW  - Opaque minerals
KW  - Birefringence of minerals
ER  -