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Diversity in communications is most appropriately understood as a free flow of ideas. In order to implement diversity, a comprehensive model of the communication process must be used for policy research, so that the various participants in the process can be properly restrained from abridging the free flow of ideas. The setting of priorities for implementing diversity has been illustrated using available studies of broadcast and cable television.  相似文献   
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Reviews     
Vojtech Mastny, Russia's Road to the Cold War: Diplomacy, Warfare, and the Politics of Communism, 1941–1945. New York: Columbia University Press, 1979. xix + 409 pp. $16.95.

Hugh Seton‐Watson, The Imperialist Revolutionaries: Trends in World Communism in the 1960s and 1970s. Stanford, California: Hoover Institution Press, 1979. x + 157 pp. $6.95.

Egbert Jahn (ed.), Soviet Foreign Policy: Its Social and Economic Conditions. London: Allison and Busby, 1978. 160 pp. £6.50.

Stephen White, Political Culture and Soviet Politics, London: Macmillan, 1979. xi + 234 pp. £10.00 and £4.95.

Donald R. Kelley (ed.) Soviet Politics in the Brezhnev Era, New York: Praeger Publishers, 1980, vii + 269 pp. £14.25.

Morton Kaplan (ed.), The Many Faces of Communism, New York: The Free Press, 1978. x + 366 pp. $14.95.

David H. Howard, The Disequilibrium Model in a Controlled Economy, Farnborough: Lexington Books, 1980. x + 112 pp. £9.50/$20.50.

Felicity Ann O'Dell, Socialisation through children's literature: The Soviet example, Cambridge: Cambride University Press, 1978, x + 277 pp. £14.00.

Martin McCauley, Marxism‐Leninism in the German Democratic Republic. The Socialist Unity Party (SED), London: Macmillan, 1979. xix + 267 pp. £12.00.

R. W. Makepeace, Marxist Ideology and Soviet Criminal Law, Croom Helm, Barnes & Noble, 1980. 319 pp. £13.95.

Jan Tomasz Gross, Polish Society under German Occupation: The General‐gouvernement, 1939–1944, New Jersey: Princeton University Press, 1979. xviii + 343 pp. £11.00  相似文献   

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Morganthau T  Coppola V  Carey J  Cooper N 《Newsweek》1983,102(6):30-6, 39-40
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Social scientists have increasingly become involved in the submission of amicus curiae or friend of the court briefs in legal cases being decided by state and federal courts. This increase has triggered considerable debate about the use of briefs to communicate relevant social science research. This article evaluates the strengths and weaknesses of various methods of summarizing social science research for the courts. It also reviews the procedures for submitting briefs developed by the American Psychology-Law Society which, in collaboration with the American Psychological Association, has submitted its first brief inMaryland v. Craig, a case recently decided by the U.S. Supreme Court.The authors wish to thank James Ogloff, Kathy Roesch, and Claudia Worrell for their comments on an earlier draft  相似文献   
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"Selective pregnancy reduction" is a medical procedure used to reduce a multiple pregnancy, often a multiple pregnancy induced by in vitro fertilization or drug therapy. In such instances, healthy embryos are sacrificed in order to maximize the chances of survival of the remaining embryos or to allow the mother to choose the number of babies she wishes to deliver. Physicians appear to rely on Roe v. Wade in assuming the legality of the procedure, although such an assumption may be erroneous. Rather than continue to implant an excessive number of pre-embryos, the American Medical Association and the Association of Obstetrics and Gynecology should adopt guidelines similar to those established by the Voluntary Licensing Authority in London, which limit the number to be inserted to a maximum of three. Careful ultrasound monitoring could ensure that no more than three embryos implant when fertility drugs are used. Such practices would help physicians avoid the many moral, ethical, legal, and philosophical problems caused by selective pregnancy reduction.  相似文献   
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