An essay on the psychology of invention.
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Word Count
36,250 words, Guess
Page Count
145 pages
Identifiers
- Open LibraryOL21476952M
- ISBN-100486201074
- OCLC Control Number494733
- OCLC Control Number27061574
- OCLC Control Numberpsychologyinvent00hada
and 3 more
- Library of Congress Control Number54004731
- LibraryThing288384
- Goodreads1454428
Classifications
- LCCQA9 .H25 1954
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