000 00282nam a2200109Ia 4500
001 81128
008 170722s9999 xx 000 0 und d
100 _aLayton, David
245 _aInnovations in science and technology education 2v /
260 _bUnesco
_aPazris
_c1986
942 _cGEN
999 _c26089
_d26089