TY  - BOOK
AU  - Winchell,Alexander N.
AU  - Winchell,N.H.
TI  - Elements of optical mineralogy: an introduction to microscopic petrography 
U1  - 552 
PY  - 1937///
CY  - New Delhi
PB  - Wiley Eastern
KW  - Optical mineralogy
KW  - Mineralogy
KW  - Microscopes
N1  - Part I of the first edition of this work was prepared chiefly by N. H. Winchell .. and parts II and III were prepared by Alexander N. Winchell .. The second edition was entirely rewritten and much enlarged by the present author."--Pref; Includes in
ER  -