(3GdJOGNd Hjf GdHcJjQjG hGdaWQ aj QhGTM LPhQ hfHGJ GdMfWI (B/ s - (3GdJcQjJj, YQhHI NGdO YHGSs ((3HZOGO (B:s (3LGeYI HZOGO,s, 1990)
(3QSGdI eGLSJjQ LGeYI HZOGOs
Keywords: (3GdMHhHs; (3JdbjM GdfHGJs