| 000 | 00381cam a22001217a 4500 | ||
|---|---|---|---|
| 008 | 180718b1972 xxu||||| |||| 00| 0 eng d | ||
| 020 | _a0408702524 | ||
| 082 | _aP141 H255s | ||
| 245 |
_aStrategies for programmed instruction: an educational technology _cedited by J. Hartley |
||
| 260 |
_aLondon _bButterworth and co(publishers) Ltd. _c1972 |
||
| 300 | _a231p. | ||
| 700 | _aHartley,J. | ||
| 999 |
_c503883 _d503883 |
||