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Optical Calcite Deposits in Park and Sweet Grass Counties, Montana
GEOLOGICAL SURVEY BULLETIN 1042-M
Optical Calcite Deposits in Park and Sweet Grass Counties, Montana By W. C. STOLL and FRANK C. ARMSTRONG S CONTRIBUTIONS TO ECONOMIC GEOLOGY l
GEOLOGICAL SURVEY BULLETIN 1042-M
A report on Montana deposits that pro vided essential optical material during the early years of ff^orld ffiar II
UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1958 UNITED STATES DEPARTMENT OF THE INTERIOR
FRED A. SEATON, Secretary
GEOLOGICAL SURVEY
Thomas B. Nolan, Director
For sale by the Superintendent of Documents, U. S. Government Printing Oifice Washington 25, D. C. CONTENTS