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Optical illusions -- See Also the narrower term Upside-down books
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3
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Optical illusions -- History -- 18th century. / https://id.loc.gov/authorities/subjects/sh85095148 https://id.loc.gov/authorities/subjects/sh2002006124 : Stafford, Barbara Maria,
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1994
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5
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Optical illusions -- Juvenile fiction. / https://id.loc.gov/authorities/subjects/sh85095148 https://id.loc.gov/authorities/subjects/sh99001687 : Priceman, Marjorie.
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2001
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