TY  - BOOK
AU  - Winchell, Alexander N
TI  - Elements of optical mineralogy; an introduction to microscopuic petrography
PY  - 1951///
CY  - John wiley & sons,Inc.
PB  - New York
UR  - http://14.139.222.13:80/cgi-bin/koha/opac-detail.pl?biblionumber=768
ER  -