00270nam a2200097 a 450000500170000008200240001710000210004124500430006226000480010530000190015320251203091512.0  a519.502415,bD, gar  aGarrett, Henry E  aStatistics in psychology and education  aBombaybVakils, Feffer and simons ltdc1961  axii,491p, 22cm