00313nam a2200109Ia 450000500170000000800410001708200150005810000150007324500640008826000430015230000080019520260224041005.0260224s9999||||xx |||||||||||||| ||und||  a001.42 RAY  aRay, G.L.  0aResearch methods in social sciences and extension education  aLudhiana : Kalyani Publications c1999  a321