C ELS31         TEMPORARY STORAGE FOR ELM31A AND ELM31B
C
C NMRKS       TEMPORARY STORAGE FOR NMARK
C NMRKSS      TEMPORARY STORAGE FOR NMARKS
C MKGS        TEMPORARY STORAGE FOR MKG
C NDIFMS      TEMPORARY STORAGE FOR NDIFM
C
      LOGICAL         MKGS
      INTEGER         NMRKS, NMRKSS, NDIFMS
C
      COMMON /ELS31/  NMRKS, NMRKSS, MKGS, NDIFMS