(3GdGNhGf GdeSdehf (B/ s - (3ejJTd (B, (3QjJTGQOs; (3efi GfjSs; (3YHOGdSdGe QVhGfs ([S.N] : (3ecJHI eOHhdi , s, 1985)
Keywords: (3GdYUQ GdMOjKs; (3eUQs; (3JGQjNs; (3KhQI (B23 (3jhdjh (B1952s; (3GdGSdGe hGdSjGSIs; (3GdGNhGf GdeSdehfs