A two way photo-electric traffic counter
- Författare
- Homer J. (Homer Jackson) Dana
- (Homer J. Dana., Monthly bulletin of the State College of Washington, vol. xxi, no. 8., Caption title: A two way photo-electric counter, with notes on the selective type of counter., Includes bibliographical references.)
- Genre
- Ej skönlitteratur
- Språk
- Engelska
| Förlag | År | Ort | Om boken | ISBN |
|---|---|---|---|---|
| State College of Washington | 1939 | Washington, Pullman, Wash | 17 pages illustrations, diagrams 23 cm. |