TY  - BOOK
AU  - Blackburn,William H.
AU  - Dennen,William H.
TI  - Principles of mineralogy
SN  - 8185392528
U1  - 549 
PY  - 1988///
CY  - New Delhi
PB  - Universal Book Stall
KW  - Mineralogy
KW  - Symmetry
KW  - Mineralogic variations
KW  - Crystallography
ER  -