Glass limit standards deposited at NBS for railway, highway and airways traffic signal colors
Subtitle: history, permanence and colorimetric properties
By: Geraldine W. Haupt
Series: NBS technical note -- 564
Publisher: U.S. National Bureau of Standards; For sale by the Supt. of Docs., U.S. Govt. Print. Off.
Published: 1971
Place of publication: Washington
Language: eng
Number of pages: 119
Subjects: Signal lights -- Standards
Notes: Chiefly tables

Includes bibliographical references (p. 114-117)