00261nam a2200109Ia 4500082002500000100002700025245004500052260003000097300001400127500000500141700000500146  a519.5019394bB575.PB  aBhattacharya, Srinibas  aPsychometrics and behavioural researchb  aNew DelhibSterlingc1972  aiv, 254p.  a  a