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1Published cop 1982.“…American Enterprise Institute for Public Policy Research,…”
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2Published cop. 1984.“…American Enterprise Institute for Public Policy Research,…”
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3Published 1976.“…American Enterprise Institute for Public Policy Research etc…”
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4Published [1973]“…American Enterprise Institute for Public Policy Research etc…”
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5Published 1972.“…American Enterprise Institute For Public Policy Research [etc…”
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