000 00304cam a22001097a 4500
008 180718b1972 xxu||||| |||| 00| 0 eng d
082 _aP14 Un3th
100 _aPocztar, Jerry
245 _aTheory and Practice of programmed Instruction
_cby Jerry Pocztar
260 _aParis
_bUNESCO
_c1972
300 _a179p.
999 _c494540
_d494540