LDGSL/1107/A/1/7 | California Institute of Technology (Caltech), 1969 | Apr-Jun 1969 | 
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LDGSL/1107/A/1/9 | Cambridge University, 1969 | Sep-Dec 1969 | 
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LDGSL/1107/A/1/10 | General scientific correspondence, 1970 | 1970 | |
LDGSL/1107/A/1/11 | General scientific correspondence, 1971 | Jan-Jul 1971 | |
LDGSL/1107/A/1/14 | General correspondence, 1974 | 1973-1974 | 
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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/1/26 | General correspondence, 1986 | 1986 | |
LDGSL/1107/B/3/3 | Working file for "Simple plate models of mantle convection" (1978) | 1975-1977 | |