Announcement of changes in electrical and photometric units. Issued May 15, 1947
Series: Its Circular -- C459; Circular of the National Bureau of Standards -- C459
Publisher: U.S. Govt. Print. Off.
Published: 1948
Place of publication: Washington
Language: eng
Subjects: Electric units; Photometry
Notes: At head of title : U. S. Dept. of Commerce. National Bureau of Standards

"Selected references": p. 7