(3GdJOGhi HGdbQGf (B/ s - (3YHOGdefYe bfOjds ([S.N] : (3ecJHI GdJQGK GdGSdGei , s, 1987)
Keywords: (3GdbQGf hGdWHs; (3GdbQGf (B- (3GYLGRs