| Type |  Book |
| ชื่อเรื่อง | IESNA guide for photometric measurements of roadway sign installations / prepared by: The Photometry for Outdoor Luminaires Subcommittee of the IESNA Testing Procedures Committee |
| ISBN | 0879951966 |
| พิมพลักษณ์ | New York, N.Y. : Illuminating Engineering Society of North America, c2003 |
| รูปเล่ม | 9 p. : ill. ; 28 cm |
| หัวเรื่อง | Electric lighting |
| | Lighting |
| | Photometry |
| | Street signs --Lighting --Measurement [] |
| | Traffic signs and signals --Lighting --Measurement [] |