- FondsJeffreysB - Papers of Bertha Jeffreys
- SeriesC - Research
- SubseriesC61-C81 - Other research material
- ItemC61 - Spiral bound notebook used for notes on the literature
- ItemC62 - Typescript and manuscript calculations by P.-O. Löwdin, one dated January 1952
- ItemC63 - R.R.E. Memorandum no. 1923 'On the related-equation method of asymptotic approximation (W.K.B. or A-A method), with some quantum-mechanical illustrations' by E.R. Pike, June 1962
- ItemC64 - R.R.E. Memorandum no. 2004 'Related-equation (W.K.B. or A-A) theory of perturbed, one-dimensional, spatially periodic systems' by E.R. Pike and P.N. Butcher, July 1963
- ItemC65 - Hardback notebook inscribed inside front cover 'Dennis V. Lindley [...]'
- ItemC66 - 'Escape of gases from the atmosphere'
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