A copy of a photograph of John Hubbard with colleagues at Marconi Space Defence Systems Limited 1989 Math Eitemau Uwchlwytho gan Archif Cyn-filwyr Gorllewin Cymru
John Hubbard summary of content of memoirs filmed for video interview Math Eitemau Uwchlwytho gan Archif Cyn-filwyr Gorllewin Cymru
