The Trachtenberg speed system of basic mathematics.
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| Main Author: | |
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| Other Authors: | |
| Format: | Book |
| Language: | English |
| Published: |
Garden City, N.Y.,
Doubleday,
1960.
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| Edition: | [1st ed.] |
| Subjects: |
| Physical Description: | 270 p. illus. 22 cm. |
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