000 00297nam a2200121Ia 4500
100 _aButts, David
020 _a06-041102-3
942 _cBK
245 _aThe teaching of science
_ba self-directed planning guide
260 _aHarper & row, New york
_c1974
082 _a372.3 But
300 _axiv; 265
999 _c9763
_d9763