00393nam a2200133Ia 4500008004100000082001700041100002100058245006200079260004900141300000800190650002000198653002100218653002000239170901s1981    xx            000 0 und d  a300.72bB51R  aBhatnagar, O. P. 0aResearch Methods and Measurements in Behavioural Sciences  aNew DelhibAgricole Publishing Academyc1981  a240  aSocial sciences  aResearch methods  aSocial sciences