2 University of Cambridge Committee black and white aerial photographs of the Plant Breeding Institute and a letter from J K S St Joseph to Douglas, 26 August 1974 giving permission to publish
Bell, GDH, The Plant Breeding Institute, Cambridge, 'History of the P.B.I. for Massey-Ferguson Award 1975': Galleyproof, 33ff; notes; corrections; correspondence with A F Dave of Massey Ferguson (UK) Ltd
Contribution of Scientific Discoveries to Increases in Agricultural Productivity during the Queen's Reign: an exhibit organised by Dr G W Cooke...for the Royal Society Jubilee Exhibition, 20 - 25 June 1977
Bell, GDH, The Plant Breeding Institute, Cambridge, 'History of the P.B.I. for Massey-Ferguson Award 1975', photocopy of manuscript: holograph, c.163ff
Bell, GDH, The Plant Breeding Institute, Cambridge, 'History of the P.B.I. for Massey-Ferguson Award 1975': typescript
National Seed Development Organisation; leaflets: Avalon winter wheat, Bounty winter wheat, Norman winter wheat, Virtue winter wheat, Brigand winter wheat, ;Wheat: a guide to varieties from the Plant Breeding Institrute'. 'Developments in Plant Breeding', by Ralph Riley, Agric.Progress, 1974, 49:1-16
Booklet: 'Vernalization or Lyssenko's Method for the Pre-treatment of seed' by R O Whyte, PH.D and P S Hudson, PH.D, Bulletin No. 9 of the Imperial Bureau of Genetics