1.
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New York : Harcourt Brace Jovanich, c1980.
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2.
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New York : Putnam, 1992, c1983.
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3.
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New York : Putnam, c1989.
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4.
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New York : Putnam, c1988.
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5.
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Englewood Cliffs, N.J., Prentice-Hall [1974, c1973]
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6.
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New York : Holiday House, c1981.
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7.
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New York : Harcourt Brace Jovanovich, c1977.
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8.
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New York : Putnam, c1985.
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9.
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New York : G.P. Putnam's Sons, [1983]
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10.
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New York : Holiday House, c1976.
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