00385nam a2200145Ia 450000500170000000800410001708200120005810000210007024500460009126000300013730000090016765000390017694200070021599900170022220240821151559.0240821s9999||||xx |||||||||||||| ||und||  a307 JOH  aJohnson, Earl S. 0aTheory and practice of the social studies  aNew YorkbMacmillanc1956  a476p  aSocial science- Teaching/Resesarch  cBK  c33133d33133