00269nam a2200097Ia 4500008004100000040002500041082002100066100002500087245004000112260001900152240215s9999    xx            000 0 und d  aNORSU-DumcNORSU-Dum  aGR/370.72/Se8/c2  aSevilla, Consuelo G. 3aAn Introduction to Research Methods  bRex Book Store