LDGSL/1107/A/1/5 | England and Cambridge University, 1968 | Jun-Dec 1968 | 
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LDGSL/1107/A/1/12 | General scientific correspondence, 1972 | 1972 | 
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LDGSL/1107/A/1/13 | General scientific correspondence, 1973 | 1973 | 
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LDGSL/1107/A/1/17 | General correspondence, 1977 | Jan-Mar 1977 | |
LDGSL/1107/A/1/25 | General correspondence, 1985 | 1985 | 
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LDGSL/1107/A/1/26 | General correspondence, 1986 | 1986 | |