Widening East Trench ... Η-3 507, 508 Η:1933.0406:15 N 20979 Η:1933.0406:16 Η:1933.0406:17 N 20980 Η:1933.0406:18 N 20981 Η:1933.0406:19 Η:1933.0406:20 N 20982 Η:1933.0406:21 Η:1933.0406:22 N 20983 Η:1933.0406:23 N 20984 Η:1933.0406:24 ... 11 Apr 1933 ... Η-3-66 (pp. 507-508) ... Η-3-66 ... Η.507