United States International Trade Commission.
United States Employment Service. Occupational Analysis Branch
United States. Office of the U.S. Trade Representative. Trade Policy Staff Committee
Statistics Canada
Carol J. Buck
Unknown Author
Asociación Latinoamericana de Integración. Secretaría General
United Nations. Central American Economic Co-operation Committee.
Banco de la República Oriental del Uruguay. División Contralor del Comercio Internacional.
Miguel Gual Camarena
Customs Co-operation Council.
Commission of the European Communities
United States. Congress. House. Committee on Ways and Means
Colombia.
Australia. Dept. of Police and Customs.