(3GdeKjQ (B: s (3ef GMOGK GdYQGb GdSjGSjI (B/ s - (3ahRj , GMeO s ((3HZOGO(B: s (3OGQ GdMQjI ddWHGYI , s, 1988)
Keywords: (3GdGMhGd GdSjGSjI s