O`Connor, Robert E.
Politics and structure: essentials of American national goverment
Brooks/Cole, 1979
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Technology and economic development: a realistic perspective
edited by Samuel M. Rosenblatt
Westview Press, 1979
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Dalen, Dirk van
Logic and structure
Springer-Verlag, 1994
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MacDonald, Austin F.
American city goverment and administration
Thomas Y. Crowell , 1951
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Woll, Peter
American goverment : readings and cases
Longman , 2001
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