- FondsHoyle - Papers of Sir Fred Hoyle
- SeriesBox 30 - Box 30
- File5 - On Tektites
- Item1 - G.H.R. von Koenigswald, 'Tektite studies IX: the origin of tektites', Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen, ser. 13 70 (1967), pp. 104-112
- Item2 - Papers 24-28 from V.E. Barnes and M.A. Barnes, eds., Tektites (Stroudsburg: Dowden, Hutchinson and Ross, 1973), pp. 194-228.
- Item3 - A.R. Crawford, 'Tektites probable wholly terrestrial and related to continental movement', Geological magazine 116 (1979), pp. 261-283.