(3JNWjW hJbje GdeTQhYGJ GdRQGYjI feGPL hGeKdI ef GdRQGYI GdSYhOjI (B/ s - (3LdGd GdedGMs ([S.N] : (3OGQ GdeQjN ddfTQ , s, 1991)
Keywords: (3GdRQGYIs; (3GdHMhKs