(3GdehShYI GdJcfhdhLjG (B/ s - (3GdTQcI GdTQbjI ddeWHhYGJ T(B.(3e(B.(3Us ([S.N] : (3GdTQcI GdTQbjI ddeWHhYGJ , s, 1991)
Keywords: (3OhGFQ GdeYGQas; (3GdJcfhdhLjGs