| 000 | 00425nam a2200145Ia 4500 | ||
|---|---|---|---|
| 001 | 4399 | ||
| 008 | 110929s1971 000 0 spa | ||
| 082 | _a370.1 A182 | ||
| 100 | _aAckerman, Nathan W. | ||
| 245 |
_aSummerhill _bpro y contra _cNathan W. Ackerman |
||
| 260 |
_aBogotá _bFondo de Cultura Económica _c1971 |
||
| 300 | _a218 p. | ||
| 650 |
_aEDUCACIÓN _xMÉTODOS EXPERIMENTALES _9369993 |
||
| 942 |
_cBK _2ddc |
||
| 999 |
_c249191 _d249191 |
||