3100 needed inventions.
Our rough guess is there are 84,000 words in this book.
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Word Count
84,000 words, Guess
Page Count
336 pages
Identifiers
- Library of Congress Control Number51001839
- OCLC Control Number1434325
- Open LibraryOL6087330M
Classifications
- DDC608
- LCCT212 .Y33 1951
Subjects
Topics
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