- FondsHoyle - Papers of Sir Fred Hoyle
- SeriesBox 135 - Box 135
- File1 - Typewritten manuscript .
- File2 - Handwritten version of 135/1.
- File3 - Hand and typewritten manuscript of 135/1.
- File4 - Typewritten manuscript of 135/1. Incomplete.
- File5 - Typewritten manuscript of 135/1.
- File6 - Typewritten manuscript of 135/1 with handwritten corrections.