(3eSQMjI GdMH HGdOjfGQ (B/ s - (3MejO, CHh HcQs ((3WQGHdS (B((3djHjG(B) :s (3OGQ GdLeGgjQjI,s, 1990)
Keywords: (3GdeSQMjGJ GdYQHjIs; (3djHjGs