1.
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Franklin Lakes, NJ : Career Press, c1999.
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2.
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New York : Harper & Row, c1990.
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3.
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Chicago : VGM Career Books, c2003.
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4.
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Daleville, Ind. : The Barnwood Press, River House, c1983.
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5.
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Reading, Mass. : Addison-Wesley, 1990.
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6.
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Boston : Beacon Press, [1975]
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7.
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Boston, Beacon Press [1971]
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8.
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San Francisco : Sierra Club Books, c1980.
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9.
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New York : HarperCollins, 1993, c1992.
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10.
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Middletown, Conn. : Wesleyan University Press, [1962]
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