Letter symbols for illuminating engineering
By: sponsor: American Society of Mechanical Engineers
Contributors: American Society of Mechanical Engineers
Publisher: American Society of Mechanical Engineers
Published: 1967
Place of publication: New York, N.Y
Language: eng
Subjects: Lighting -- Notation
Genres: Notation
Notes: Cover title

"USA standard."

"USAS Y 10.18-1967 ; reaffirmed 1977."