| 000 | 00315nam a2200121Ia 4500 | ||
|---|---|---|---|
| 654 | _aPHY | ||
| 250 | _a1st Ed. | ||
| 245 | _aUnesco Source Book For Science Teaching. | ||
| 260 |
_bUnited Nations Educational Sci & Culturd Organization New York. _c1960 |
||
| 082 | _aPC-190 | ||
| 300 | _a221p. | ||
| 999 |
_c22795 _d22795 |
||
| 300 | _c22 cm. | ||
| 655 | _aP-14 | ||
| 041 | _aeng | ||
| 546 | _aText in English | ||