1.
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Boston : Houghton Mifflin Co., 1967, c1962.
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2.
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New York : Random House, c1957.
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3.
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New York : Simon & Schuster Books for Young Readers, c1996.
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4.
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New York : HarperTrophy, 1992, c1990.
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5.
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New York : Scholastic Press, c1996.
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6.
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New York : Aladdin Books ; Toronto : Maxwell Macmillan Canada ; New York : Maxwell Macmillan International, 1993.
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7.
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New York : Bradbury Press, c1986.
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8.
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New York : Crown Publishers, c1979.
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9.
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New York : Aladdin Books ; Toronto : Maxwell Macmillan Canada ; New York : Maxwell Macmillan International, 1994.
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