00416nam a2200133Ia 450000500170000000800410001704100080005808200150006610000190008124500270010026000530012730000160018065000860019620191104171220.0190710s9999    xx            000 0 und d  aeng  a370.15 C88  aCrow, Lester D 0aEducational psychology  aNew Yorkb:Litton Educational Publishing, c1963  axiv, 601p.   aEducational psychology a| Learning - general principles a| Learner - evolution