See K. Cooper, Barriers Down (1942, repr. 1969); UNESCO, News Agencies, Their Structure and Operation (1953, repr. 1969); V. Rosewater, History of Cooperative News Gathering in the United States (1930, repr. 1971); L. E. Atwood, ed., International Perspectives on News (1982); J. Fenby, The International News Services (1984).
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