How to invent / M.W. Thring and E.R. Laithwaite.
By: Thring, M. W. (Meredith Wooldridge), 1915- Thring, M. W. (Meredith Wooldridge), 1915-.
Contributor(s): Laithwaite, E. R. (Eric Roberts). Laithwaite, E. R. (Eric Roberts).
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Includes bibliographical references and index.
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