000 00303nam a2200121Ia 4500
001 81415
008 170722s9999 xx 000 0 und d
110 _aUnesco
245 _aNew trends in biology teaching comp by R Heller 2v /
260 _c1967.
490 _aTeaching of basis sciences
942 _cGEN
999 _c76341
_d76341