At head of title : <Communiqué au Consell et aux membres de la Société.> No officiel : C.231.M.99.1931.VIII. Genève, le 10. avril 1931. Société des Nations. Conférence européenne sur la circulation routière (Genève, 16-30 mars 1931) ... League of Nations. European conference on road traffic (Geneva, March 16th-30th, 1931)
French and English.
"Explanatory note with reference to admissible variations in the colours shown in the tables accompanying the annex", in French and English (2 p.) laid in. (C.231 (a) M.99 (a) 1931. VIII. Série de publications ... 1931. VIII. 7(a)