The Trachtenberg speed system of basic mathematics /
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| Main Author: | |
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| Other Authors: | , |
| Format: | Book |
| Language: | English |
| Published: |
London :
Pan,
1965 c1960.
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| Subjects: |
| Item Description: | First published in U.K. 1962 by Souvenir Press. |
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| Physical Description: | 255 p. : ill. ; 18 cm. |