Stratification in Area 29-35/ΞΑ-ΞΣΤ ... Η'-4 777, 778 Η':1933.0607:3 N 23952 Η':1933.0607:4 N 23953 Η':1933.0607:5 Η':1933.0607:6 N 23954 Η':1933.0607:7 N 23955 Η':1933.0607:8 N 41870 Η':1933.0607:9 Η':1933.0607:10 N 23956 Η':1933.0607:11 N ... 9 Jun 1933 ... Η'-4 ... Η':1933.0607:3 ... Η':1933.0607:4