LDGSL/1107/A/1/13 | General scientific correspondence, 1973 | 1973 | 
|
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/A/1/17 | General correspondence, 1977 | Jan-Mar 1977 | |
LDGSL/1107/A/1/23 | General correspondence, 1983 | 1983 | |