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| 008 | 230617s1949 xxu|| p 0 0eng d | ||
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| 245 | 1 | 0 | _aVol. 71 No. 2 |
| 260 | _c1949 | ||
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_7nnas _gVol. 71 No. 2 _tAmerican Journal of Mathematics. 1949 _w000012153 _x0002-9327 |
| 856 | 4 | 0 | _uhttps://www.jstor.org/stable/10.2307/i316352 |
| 942 | _cIS | ||
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