00499nam a2200157Ia 4500008004100000082001800041100002100059245011500080260003500195300000800230650002000238653002500258653001300283653002000296700002500316170901s1994    xx            000 0 und d  a300.724bB51V  aBhatnagar, R. P. 0aVyavahar-Vigyano mai Anusandhan ke Prayogatmak AakalpbExperimental Designs of Research in Behavioral Sciences  aMeerutbLyall Book Depotc1994  a199  aSocial sciences  aExperimental designs  aResearch  aSocial sciences  aBhatnagar, Meenakshi