(3YGde GdacQ (B((3eL(B28 \(3Y(B4 \ 2000 ) : s (3eLdI OhQjI eMceI JUOQ GQHY eQGJ ai GdSfIs ((3GdchjJ (B: s (3GdeLdS GdhWfi ddKbGaI hGdafhf hGdGOGH , s, 2000)
Keywords: (3GdGOH GdYQHi (B- (3GdeZQHs; (3GdbUI GdbUjQIs; (3Wg MSjfs; (3GdSjfeG GdYQHjIs; (3GdGOH GdYQHi (B- (3JGQjN hfbOs; (3GdbUU GdQhGFjIs; (3GdYde hGdOjfs; (3GdGOH GdYQHi (B- (3JGQjN hfbO (B- (3GdYUQGdMOjKs; (3GdGOH (B- (3adSWjfs