00411nam a2200145Ia 4500003000600000005001700006008004100023020001800064040002500082082002300107100002400130245004900154260004300203500001900246NORSU20240812031533.0240215s9999    xx            000 0 und d  a971-1024-2020  aNORSU-DumcNORSU-Dum  aFil 370.712 G81 c3  aGregorio, Herman C. 0aPrinciples of Elementary-Secondary Education  bR.P. Garcia Publishing Co., Inc.c1984  aincludes index