LDGSL/1107/A/1/14
General correspondence, 1974
1973-1974
LDGSL/1107/A/1/15
General correspondence, 1975
1975
LDGSL/1107/A/1/16
General correspondence, 1976
1976
LDGSL/1107/B/5/1
Working file, 'Gravity & bathymetry'
1978-1979