      INTEGER        N_NR_DIFF
      PARAMETER     (N_NR_DIFF = 0)
      INTEGER        N_NR_DIFFD
      PARAMETER     (N_NR_DIFFD = 1)
      CHARACTER*16   NR_DIFF(N_NR_DIFFD)
      INTEGER        NR_DIFF_MAP(N_NR_DIFFD)
