(3OjhGf GdQGYi GdfejQi (B/ s - (3aGjjQJ, QGjfgQJ (B((3JMbjb(B)s ([S.N] : (3fgVI eUQ ddWHGYI hGdfTQ hGdJhRjY , s, 1980)
Keywords: (3GdTYQ GdYQHis; (3OhGhjf hbUGFOs