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

التفاصيل البيبلوغرافية
مؤلفون مشاركون:	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
التنسيق:	كتاب
اللغة:	English
منشور في:	Washington Highway Research Board D.C., 1969.
سلاسل:	Highway research record no. 299.
الموضوعات:	Traffic signs and signals > International cooperation. Transportation > Europe. Urban transportation policy > Great Britain. Transportation > International cooperation.