00253nam a2200097Ia 4500008004100000022001800041040002500059082001700084245003000101260002400131240214s9999    xx            000 0 und d  a9781680947373  aNORSU-DumcNORSU-Dum  a540/G28/2018 0aGeneral chemistry 1 and 2  b3G E-Learningc2018