TY  - BOOK
AU  - Shelley, David
TI  - Manual of optical minerology
U1  - 549.125 
PY  - 1975///
CY  - New york
PB  - Elsevier scientific publishing
KW  - Principles of optical mineralogy
KW  - Polarising microscop
KW  - Mineral descriptions
KW  - Crystallography
ER  -