(3UfOhb GdfbO GdYQHj (B:s (3eMGVQ GdGLJeGYGJ hGdCYeGd GdJegjOjI ddCJaGbjI(B.s (3GdLRA GdChd (B/s - (3GdCeGfI GdYGeI deLdS GdhMOI GdGbJUGOjI GdYQHjIs ((3ZjQ eMOO s (3ZjQ eMOOs, 1977)
Keywords: (3GdeGdjI GdYGeI hGdJTQjY GdVQjHjs