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I Wonder Why Zippers Have Teeth and Other Questions About Inventions (I Wonder Why (New York, N.Y.).)
I Wonder Why Zippers Have Teeth and Other Questions About Inventions - I Wonder Why New York, N.Y. Author:Barbara Taylor "What did people use before they had refrigerators?" and "Where do inventors get their ideas?" are some of the questions answered in this intriguing look at inventions.