TY  - BOOK
AU  - Winchell,Alexander N.
TI  - Elements of optical mineralogy
PY  - 1939///
CY  - New York : 
PB  - John Wiley and Sons, 
N1  - T.1: Principles and methods    T.2: Descriptions of minerals. With special reference to their optic and microscopic characters    T.3: Determinate tables
ER  -