(3efGN GdNdjL GdYQHi (B/ s - (3YHOGdedc Ydi GdcdjHs ([S.N] : (3PGJ GdSdGSd ddWHGYI hGdfTQ , s, 1990)
Keywords: (3GdLZQGajG GdWHjYjIs; (3GdNdjL GdYQHis; (3GdefGNs