(3af GdMaQ Ydi GdNTH (B: s (3WQjbI GdJfajP eY JUejeGJ eYOI ddMaQ hYQV dehVhYGJ JGeI GdJfajP (B/ s - (3YfGjGJ GdegOis ((3GdbGgQI (B: s (3ecJHI GHf SjfGA , s, 1990)
Keywords: (3GdWQb GdafjIs; (3Gdafhf GdJTcjdjIs; (3GdJUejes; (3MaQ GdNTHs; (3GdMaQs