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Let's Discover the World of Machines

Steck-VaughnSteck-Vaughn Company

出版	Raintree Publishers, 1986
主題	Juvenile Nonfiction / Technology / Machinery & ToolsTechnology & Engineering / MechanicalTechnology & Engineering / Machinery
ISBN	08172259199780817225919
URL	http://books.google.com.hk/books?id=YEtmwYMIVAgC&hl=&source=gbs_api

註釋

A reference book dealing with simple machines, machines in the home, transportation and power machines, and large machinery found on the farm, in construction, and in factories.