00406nam a2200133 a 450000500170000000800410001705000260005810000240008424500620010826000600017030000210023052100080025165000130025920140310183206.0030123s19uu    xx            00    eng d  aLB 1025b.G821Pr 1976  aGregorio, Herman C.  aPrinciples and methods of teaching /cHerman C. Gregorio.  aQuezon City, Philippines :bGarotech Publishing,c1976.  a550 p. :c25 cm.  aEDU  aTeaching