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Censo nacional de población, familias y viviendas 1970 : resultados provisionales
(1970)
International sugar agreement, 1987 : [the United Nations Sugar Conference, 1987, having met in London from 10 to 11 September]
(1990)
International natural rubber agreement, 1995 : [the United Nations Conference on Natural Rubber, 1994 ... was held at the Palais des Nations, Geneva, in three parts: the first from 5 to 15 April 1994, the second from 3 to 14 October 1994 and the third from 6 to 17 February 1995]
(1995)