00341nam a2200145Ia 450000100060000000800410000602000180004704000130006508200160007810000250009424500500011926000090016930000100017854600070018815478140403s9999 xx 000 0 und d a0-697-16574-4 cPK-LaUMT a 540bGEB-C aGebelein, Charles G. aChemistry and our worldcGebelein, Charles G. c1997 a609 p aEN