(3YGde GdLf h GdTjGWjfs - (3GdCTbQ,YeQ SdjeGf YHOGddgs ((3GdchjJs (3ecJHI GdadGMs, 1997)
(3GdeMJhjGJ (B: (3a(B1(3GdJYQja HYGde GdLf h GdTGWjf(B--(3a(B2(3Jcdja GdLf(B--(3a(B3(3GdYOGA Hjf GdEfSGf h GdTjWGf(B--(3a(B4(3CSdMI GdDef ai MQHI eY GdTjWGf(B--(3a(B5(3YdGL GdUQY(B--(3a(B6(3GdMceI ef NGb GdTjWGfs
7
Keywords: (3GdLfs; (3GdSMQs; (3GdTjGWjf h GdLGfs; (3GdYdGL HGdbQBfs