Stratification in Area 25-30/ΝΗ-ΞΣΤ ... Η'-4 737, 738 Η' 407 S 373 Η':1933.0601:23 N 23857 Η':1933.0601:24 N 41864 Η':1933.0601:25 N 41865 Η':1933.0601:26 N 23858 Η':1933.0601:27 N 23859 Η':1933.0601:28 N 41866 Η':1933.0602:1 N 23860 Η':1933.0602:2 ... 5 Jun 1933