00365nam a22001217a 4500008004100000020001500041082002700056100002400083245006000107260004700167300001600214650001300230140225b        xxu||||| |||| 00| 0 eng d  a9718711082  aFil. 371.3 G861bc1960  aGregorio, Herman C.  aPrinciples and methods of teaching/cHerman C. Gregorio  aQuezon City:bGarotech Publishing,cc1960.  axx, 580p. :  xTeaching