TY  - BOOK
AU  - Heinrich, E. Wm
TI  -  Microscopic identification of minerals
U1  - 549 
PY  - 1965///
CY  - New york
PB  - McGraw- hill
KW  -  Optical propreties of minerals
KW  -  Microscopic methods of study of minerals
KW  - Immersion method
ER  -