(3ebOeI aj GdbjGS GdGbJUGOj (B/s - (3TQja , YUGe YRjR s ((3GdLRGFQ (B:s (3OjhGf GdeWHhYGJ GdLGeYjI ,s, 1981)
Keywords: (3GdbjGS s; (3GdGbJUGOj s; (3ebOeI s