(3GdGMcGe GdYGeI aj bGfhf GdGee(B:s (3bGfhf GdSdGe (B/ s - (3eMeO WdYJ GdZfjejs ((3GdGScfOQjI(B:s (3efTGI GdeYGQa,s, 1970)
(3GdfU CZdHg HGddZI GdYQHjI eY HYV GdfUhU GdEfLdjRjIs
Keywords: (3GdCee GdeJMOIs; (3GdbGfhf GdOhdj GdYGes