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Published online by Cambridge University Press: 22 May 2009
1 The countries included in the survey are the following: Afghanistan, Algeria, Argentina, Australia, Austria, Burma, Canada, Ceylon, Colombia, Czechoslovakia, the Democratic Republic of the Congo, Ethiopia, the Federal Republic of Germany (West Germany), Finland, France, Ghana, Greece, die Holy See, Hungary, India, Iran, Iraq, Israel, Italy, Japan, Malaysia, Mexico, Morocco, the Netherlands, Norway, Pakistan, Paraguay, Peru, the Philippines, Rhodesia, Rumania, Senegal, Sierra Leone, South Africa, South West Africa (Namibia), Sudan, Sweden, Switzerland, Thailand, Tunisia, the United Arab Republic, the United Kingdom, the United States, and me Union of Soviet Socialist Republics.