National Bureau of Standards and Commerce Department
Sort Author:
National Bureau of Standards
Date:
Oct. 4, 1941
Publish Date ISO Format:
1941-10-04T00:00:00Z
Publication Start:
19411004
Publication End:
19411004
Corporate/Agency Author:
National Bureau of Standards
Publication month:
3
Publication year:
1941
SuDoc number:
C 13.16:668
Description:
5 p. 4°
Notes:
(Letter circular LC-668.) [Processed. Prepared in cooperation with John J. Bowman, chairman of Educational Committee of Horological Institute of America.]
Notes:
(Letter circular LC-668.) [Processed. Prepared in cooperation with John J. Bowman, chairman of Educational Committee of Horological Institute of America.] † Distribution Made by Issuing Office.