Safety lamps, including flame safety lamps and approved electric lamps
Contributors: United States. Federal Board for Vocational Education
Edition: Rev. ed.
Series: Bulletin -- no. 42; Trade and industrial series -- no. 12; Bulletin -- no. 42.; Trade and industrial series -- no. 12.
Publisher: U.S. G.P.O.
Published: 1931
Place of publication: Washington, D.C
Language: eng
Subjects: Vocational education
Notes: Issued by U.S. Federal Board for Vocational Education.