I wonder why zippers have teeth and other questions about inventions

Answers a wide variety of questions about the invention of common household items.

Kingfisher
2003
9780329347338
book

Holdings

hidmidmiidnidwidlocation_codelocationbarcodecallnumdeweycreatedupdated
199947255811222454151314113203GRLR242GRLR024657608 TAY60815825759371742569409
223139257845012241151314113203SPCVES421SPCV011857608 TAY60815825759371709307855