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| 008 | 991125s1971 mx a fr 000 0 spa d | ||
| 082 | 0 | 4 |
_a371.1 _bACK 1971 |
| 100 | 1 | _aAckerman, Nathan W. | |
| 245 | 1 | 0 |
_aSummerhill _bpro y contra _cNathan W. Ackerman |
| 264 |
_aMéxico _bFondo de Cultura Económica _c1971 |
||
| 300 | _a218 p. | ||
| 650 | 4 |
_aEducación _xmétodos experimentales |
|
| 650 | 4 |
_aSummerhill _xmétodos de enseñanza |
|
| 905 | _aLibros | ||
| 950 | _c20000814 | ||
| 950 | _c20021023 | ||
| 950 | _c20060109 | ||
| 950 | _c20090311 | ||
| 950 | _c20090311 | ||
| 950 | _c20111027 | ||
| 950 | _c20230914 | ||
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