000 00315nam a2200109Ia 4500
008 240531s9999 xx 000 0 und d
082 _a507 13COL
100 _aNULL
245 0 _aUsing the environment 2 investigations: part 2, unit for teachers.
260 _aNew York
_b Macdonald Educational
_c1974
942 _cANF
999 _c313495
_d313495