(3GdefGVd GdWHbi Ydi GdWQjbI GdJGhjI (B/ s - (3cGXe LgGOs; (3YHOGdcHjQ GdNWjHis ([S.N] : (3OGQ JhHbGd ddfTQ , s, 1980)
Keywords: (3GdTYQ GdYQHis; (3GdGOH GdYQHis