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_a510 _bT644 |
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_aToft, Louis. _9120 |
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| 245 | 1 | 0 |
_aPractical mathematics _cby Louis Toft |
| 250 | _a3rd | ||
| 260 |
_aLondon _bPitman _c1951 |
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| 300 | _avii,504p. | ||
| 365 | _d11.04 | ||
| 650 | 0 | _aMathematics | |
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_9552 _aMcKay, A. D. D. |
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| 942 | _cBK | ||