Detectors for automatic fog-warning signs
Title:
Detectors for automatic fog-warning signs
Author:
California. Transportation Laboratory.
Corporate Author:
Physical Description:
iii, 18 pages : illustrations
General Note:
Research report no. CA-DOT-TL-7121-1-73-22.
Interim report, sponsored by the California Dept. of Transportation.
Added Author:
Added Corporate Author: