Ground and polished lenses for sun glasses.

Bibliographic Details
Uniform Title:Commercial standard ; CS78-39.
Corporate Author: United States. National Bureau of Standards (Issuing body)
Language:English
Published: Washington, D.C. : United States Department of Commerce, National Bureau of Standards, 1940.
Series:Commercial standard ; CS78-39.
Subjects:
Sunglasses > Standards > United States.
Lenses > Standards > United States.
Physical Description:ii, 8 pages ; 24 cm.
Format: Government Document Book
Description
Note:"Effective date for new production from October 10, 1939."
"A recorded voluntary standard of the industry."
Call Number:C 13.20:78/939