(3CSQGQ hNaGjG GdeGajG (B:s (3QMdI eY edhc GdbJd hGdOYGQI hGdeNOQGJ dCcKQ ef (B50 (3SfI OGNd CejQcG (B/s - (3CHh GdQhS, Cjef GdMSjfjs ((3GdbGgQI (B:s (3ecJHI GHf SjfG ddfTQ hGdJhRjY hGdJUOjQ,s, 1989)
(3HHdjhLQGajI (B: (3U(B. 94.s
Keywords: (3GdeGajGs; (3GdLQjeI hGdeLQehfs