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The True Book of Magnets and Electricity

Illa Podendorf

出版	Childrens Press, 1961
URL	http://books.google.com.hk/books?id=yxJ0jIqYIyYC&hl=&source=gbs_api

註釋

An introduction to permanent magnets, electricity, and electric magnets, how they work, and their uses.