(3ef YGde GdTgQI Edi QMGH GdEjeGf (B:s (3eTGgjQ YQahG GdWQjb (B/s - (3GdLgjfj, CSeGA CHh HcQs ((3GdbGgQI (B:s (3ecJHI GHf SjfG ddfTQ h GdJhRjY h GdJUOjQ ,s, 1990)
Keywords: (3GdhYX hGdEQTGOs; (3GdJhHI (B((3ESdGe(B)s