- FondsJeffreys - Papers and correspondence of Sir Harold Jeffreys
- SeriesB1-B316 - Research
- SubseriesB192-B211 - Standard Earth Model
- FileB194-B199 - 'Correspondence about the Standard Model 1977-1983'
- ItemB194 - 1977
- ItemB195 - 1978
- ItemB196 - 1979-1980
- ItemB197 - 1981
- ItemB198 - 1982
- ItemB199 - 1983