LDGSL/1107/A/1/12 | General scientific correspondence, 1972 | 1972 | 
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LDGSL/1107/A/1/14 | General correspondence, 1974 | 1973-1974 | 
|
LDGSL/1107/A/1/16 | General correspondence, 1976 | 1976 | |
LDGSL/1107/A/1/25 | General correspondence, 1985 | 1985 | 
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LDGSL/1107/A/1/28 | General correspondence, 1988 | 1988 | |
LDGSL/1107/A/1/31 | General correspondence, 1991 | 1991 | |
LDGSL/1107/A/1/32 | General correspondence, 1992 | 1992 | 
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LDGSL/1107/A/1/33 | General correspondence, 1993 | Jan-December 1993 | |
LDGSL/1107/A/1/34 | General correspondence, 1994 | Jan-Dec 1994 | |