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1
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2Published cop 1982.“…American Enterprise Institute for Public Policy Research,…”
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3Published 1975“…American Enterprise Institute for Public Policy Research,…”
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4Published cop. 1987.“…American Enterprise Institute for Public Policy Research,…”
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5Published [1974]“…American Enterprise Institute for Public Policy Research,…”
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6Published cop. 1978.“…American Enterprise Institute for Public Policy Research,…”
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7Published 1988.“…American Enterprise Institute for Public Policy Research,…”
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8Published 1963.“…American Enterprise Institute for Public Policy Research,…”
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9Published cop. 1984.“…American Enterprise Institute for Public Policy Research,…”
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10Published 1976.“…American Enterprise Institute for Public Policy Research etc…”
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11Published [1973]“…American Enterprise Institute for Public Policy Research etc…”
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12Published 1972.“…American Enterprise Institute For Public Policy Research [etc…”
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