003620000a22001330004500060000800000082001500008100002100023100002500044245005700069260003300126260000900159300000800168650005200176  a100  a370.78 VAN  aMeyer, William I  aVan Dalen, Deobold B  aUnderstanding educational research : an introduction  aLondon, Mc Graw-Hill Book Co  c1962  a525  aEducation/ Research / Analysis/ Social Progress