Recognition distances and understanding of legends on an experimental motorway signal
| मुख्य लेखक: | |
|---|---|
| अन्य लेखक: | |
| स्वरूप: | पुस्तक | 
| भाषा: | English | 
| प्रकाशित: | Crowthorne, [Eng.]
          Transport and Road Research Laboratory
    
        1979. | 
| श्रृंखला: | Supplementary report - Transport and Road Research Laboratory
              500 |