000 00426nam a2200169Ia 4500
008 170901s1969 xx 000 0 und d
082 _a540.7
_bC23N
100 _aUNESCO
245 0 _aNew Trends in Chemistry Teaching
260 _aParis
_bUNESCO
_c1969
300 _a407
650 _aChemistry and allied sciences
650 _aPure Sciences
653 _aChemistry
653 _aStudy and teaching
942 _2ddc
_cBK
_01
999 _c5389
_d5389