European agreement concerning the international carriage of dangerous goods by road (ADR) and protocol of signature : done at Geneva on 30 September 1957 : volume I : agreement, protocol of signature, annex A and appendices to annex A with amendments thereto up to 1 January 1990
European agreement concerning the international carriage of dangerous goods by road (ADR) and protocol of signature : done at Geneva on 30 September 1957 : volume II : annex B with amendments thereto up to 1 January 1990
World demographic estimates and projections, 1950-2025 : total population : school-age population : economically active population : agricultural and non-agricultural population : urban and rural population
Assessing the demographic consequences of major development projects : proceedings of a United Nations Workshop, New York, 1-4 December 1986