Standard specifications for incandescent electric lamps
Edition: <5th ed.> Issued May 25, 1912.
Series: Circular of the Bureau of standards -- no. 13
Publisher: Govt. print. off.
Published: 1912
Place of publication: Washington
Language: eng
Number of pages: 16
Subjects: Incandescent lamps
Notes: S.W. Stratton, director.

At head of title: Department of commerce and labor.