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Published online by Cambridge University Press: 27 February 2017
1 See Kenneth Janda, Data Processing: Applications to Political Besearch, Ch. VIII (Evanston: Northwestern University Press, 1965).
2 See SDC Magazine (March, 1965), esp. pp. 2-6, 12-14; Information Eetrieval, Technology Series, System Development Corporation, Santa Monica, no date.