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How Things Work
C. E. Berry
Hardcover (Time Life Education, Aug. 1, 1989)Questions and answers provide information about how cameras, elevators, car engines, tops, yo-yos, and other devices work. Includes charts, diagrams, and an activities section.
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How Things Work : The Universal Encyclopedia of Machines
No Author Credited
Paperback (Paladin, St Albans, March 15, 1972)Good solid copy. Some cover wear and spine creasing, pages tanned
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How Things Work
C. E. Berry
Hardcover (Time Life Education, March 15, 1754)None