| 000 | 00454nam a2200157Ia 4500 | ||
|---|---|---|---|
| 008 | 190328s9999||||xx |||||||||||||| ||und|| | ||
| 040 |
_aNITIL _cNITIL |
||
| 082 |
_221st _a373 _bU53S |
||
| 100 | _aUmstattd, J G | ||
| 245 | 0 |
_aSecondary school teaching _cJ G Umstattd |
|
| 250 | _a3rd | ||
| 260 |
_aBoston _bGinn _c1953 |
||
| 300 | _axii, 488p. | ||
| 650 | _aEducation, Secondary; Teaching; Instructional systems; Teaching-Aids and devices | ||
| 942 | _cBKS | ||
| 999 |
_c39627 _d39627 |
||