| 000 | 00622nam a2200193 a 4500 | ||
|---|---|---|---|
| 005 | 20210223130822.0 | ||
| 008 | 081109s1957 mx r 000 0 spa d | ||
| 035 | _aUPN01000166321 | ||
| 049 | _aUNE | ||
| 080 | _aOC 058.7: 002.6: 37.001.5 (100) =20 CEN No.22. | ||
| 245 | 0 | 0 |
_aEducation clearing houses and documentation centres : _bA preliminary international survey. |
| 260 |
_aParis : _bUNESCO, _c1957. |
||
| 300 | _a65 p. | ||
| 440 | 0 |
_aEducational studies and documents ; _v22. |
|
| 690 | _aEstablecimientos de enseñanza | ||
| 690 | _aBibliotecas especiales | ||
| 690 |
_aDirectorios _92281 |
||
| 905 | _aUNESCO | ||
| 999 |
_c138432 _d138432 |
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