| 000 | 00680nam a2200193 a 4500 | ||
|---|---|---|---|
| 005 | 20250116063833.0 | ||
| 008 | 991125s1949 gen 000 0 eng u | ||
| 035 | _aUPN01000032539 | ||
| 049 | _aCG | ||
| 050 | 4 |
_aL10 _bI69 no.111 |
|
| 111 | 2 |
_aInternational Conference on Public Education _n(12a : _d1949 : _cGeneva, Suiza) |
|
| 245 | 1 | 0 | _aIntroduction to natural science in primary school. |
| 260 |
_aGeneva : _bInternational Bureau of Education : _bUNESCO, _c1949. |
||
| 300 | _a171 p. | ||
| 440 | 0 |
_aInternational Bureau of Education. _pPublication ; _v111 |
|
| 650 | 4 |
_aCiencias naturales _xEstudio y enseñanza (Elemental) _92812 |
|
| 650 | 4 |
_aEducación _9682 |
|
| 905 | _aLibro | ||
| 999 |
_c32539 _d32539 |
||