TY  - BOOK
AU  -  Winchell,Alexander Newton
AU  -  Winchell,Horace
TI  -  Elements of optical mineralogy : :  an introduction to microscopic p etrography / 
U1  -  549.1 WIN 
PY  - 1951///
CY  -  New York : 
PB  -  Wiley, 
KW  -  Optical mineralogy
KW  -  Mineralogy, Determinative
N1  -  CONTENTS.- Pt.1.Principles and method. 5th ed.-pt.2. Description of minerals.With the collaboration of Horace winchell.4th ed.- pt.3. Deter minative tables
ER  -