United States standard for the colors of signal lights
By: prepared in collaboration with the U.S. National Committee on Colors of Signal Lights by F.C. Brenkenridge.
Publisher: For sale by the Superintendent of Documents, U.S. Govt. Print, Off.
Published: 1964
Place of publication: Washington
Language: eng
Number of pages: 30
Subjects: Signal lights -- Standards.; Colors.
Notes: Includes bibliographies.