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Public relations in the 1980's : proceedings of the eighth Public Relations World Congress, London 1979
Black, Sam, (1980)
Businessman's Guide to the centrally planned economy countries : Albania, Bulgaria, China, Cuba, Czechoslovakia, German Democratic Republic, Hungary, Poland, Romania, USSR, Yugoslavia. Fd. by Sam Black
Black, Sam, (1972)
International public relations
Black, Sam, (1995)