002930000a22001210004500003000900000005001700009100001800026245004500044264003600089300001000125041000800135650002800143PH-MaWHO20241108112212.01 aLingren, H-C.  aEducational psychology in the classroom.  aNew York : bJohn Wiley,c1972.  a516p.  aeng  aPsychology, Educational