- FondsHoyle - Papers of Sir Fred Hoyle
- SeriesBox 9 - Box 9
- File13 - IOTA 1972 letters & papers
- Item1 - Autograph letter, signed, from Don Clayton (Space Science, Rice University, Texas) to FH
- Item2 - Autograph letter, signed, from Donald Blackwell (Department of Astrophysics, Oxford) to FH
- Item3 - Typescript letter, signed, from Roger C. Jennison (Electronics Laboratory, University of Kent at Canterbury) to FH
- Item4 - Typescript letter, and carbon copy of typescript letter, signed, from Neville J. Woolf (Director, University of Minnesota Observatories) to FH
- Item5 - Black cloud over Cambridge: Letter to the Guardian (27 Apr. 1972)
- 28 more...