(3bQGQGJ efXeI GdhMOI GdGaQjbjI(B:(3GdfXQjI hGdJWHjb OhQgG ai Md eTGcd GdbGQI (B/ s - (3GMeO fHjd LhgQs ([S.N] : (3efTGI GdeYGQa GdGSdGejI , s, 1987)
Keywords: (3GdbGfhfs; (3GdbGfhf GdOhdis; (3efXeI GdhMOI GdGaQjbjIs; (3GdhMOI GdGaQjbjIs