00293nam a2200097Ia 4500008004100000040002500041082001600066100006200082245004200144260000900186230627s9999    xx            000 0 und d  aNORSU-SiacNORSU-Sia  a371.102 Ac3  aAcero, Victoria O.;  Evelyn S. Javier, Herminia O. Castro 0aPrinciples and strategies of teaching  c2000