LDGSL/1107/A/1/12
General scientific correspondence, 1972
1972
LDGSL/1107/A/1/13
General scientific correspondence, 1973
1973
LDGSL/1107/A/1/15
General correspondence, 1975
1975
LDGSL/1107/B/5/6
Working file - 'Gravity & bathymetry (4)'
1981-1984