TY  - BOOK
AU  - Kerr, Paul F.
TI  - Optical mineralogy: :4th ed
U1  - 549.125 
PY  - 1977///
CY  - New York
PB  - McGraw-Hill
KW  - Mineral optics
KW  - Silicates Chain Structures
KW  - Polarized light
ER  -