TY  - BOOK
AU  - Klein,Cornelis
TI  - Minerals and rocks: exercises in crystallography, mineralogy, and hand specimen petrology 
SN  - 0471622079
PY  - 1989///
CY  - New York
PB  - Wiley
KW  - Mineralogy
KW  - Problems, exercises, etc
KW  - Petrology
ER  -