International transportation topics 4 reports ; sign uniformity, closing the Darien gap, transportation in Europe, and transportation in Great Britain.

ग्रंथसूची विवरण
निगमित लेखकों: National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, National Research Council (U.S.). Highway Research Board. Special Committee on International Cooperative Activities
स्वरूप: पुस्तक
भाषा:English
प्रकाशित: Washington Highway Research Board D.C., 1969.
श्रृंखला:Highway research record no. 299.
विषय: