| 000 | 00312nam a2200121Ia 4500 | ||
|---|---|---|---|
| 100 | _aCurtis, Francis D. | ||
| 942 | _cBK | ||
| 654 | _a | ||
| 245 | _aThird digest of investigations in the teaching of science | ||
| 260 |
_aNew York _bTeachers College Press _c1971 |
||
| 082 | _a375.5 | ||
| 300 |
_bHb _c21.5 _axx,419 |
||
| 999 |
_c377880 _d377880 |
||
| 041 | _aeng | ||