Permissible electric lamps for miners
By: by H.H. Clark.
Series: [United States] Bureau of mines. Technical paper,; 75
Publisher: Govt. Print. Off.
Published: 1914
Place of publication: Washington
Language: eng
Number of pages: 21
Subjects: Electric lamps, Portable.
Notes: At head of title: . . . Department of the interior. Bureau of mines. Joseph A. Holmes, director.
On verso of t.-p.: . . . First edition. February, 1914.
"Publications on mine accidents and methods of mining" p. 19-21.