000 00278nam a2200121Ia 4500
100 _aUnesco
654 _aChemistry
942 _cBK
245 _aNew trends in chemistry teaching : vol.I
_b(1964-1965)
260 _aauth., Paris
_c1972
082 _a540.7 U.N.E.S
300 _ax,359
999 _c4262
_d4262