Comparative aspects of anti-trust law in the United States, the United Kingdom and the European Economic Community : a report of a Conference held on June 14, 15 and 16, 1963 at Ditchley Park, Enstone, Oxfordshire /The encouragement and protection of investment in developing countries : a report of a conference held on 28 and 29 September, 1961 /Legal problems of the European Economic Community and the European Free Trade Association : a report of a Conference held on September 29 and 30, 1960, in London /