XVth World Road Congress, Mexico, October 1975 : question ... / Permanent International Association of Road Congresses ; 8: Low cost roads, lightly trafficked roads
World Road Congress ; 15 ; 1975 ; Mexico City, Mexico World Road Congress ; 15 (Mexico City, Mexico) : 1975.
1975
Getr. Zählung
Ill., graph. Darst.
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