- CollectionCamb. Medieval History - Papers relating to the Cambridge Medieval History Series
- SeriesBox 1-2 - Letters to and from contributing historians to Cambridge Medieval History
- SubseriesBox 1 - Letters relating to historians A-L
- File40 - Letters from K. Krofta
- Item1 - Autograph letter, signed, to 'Dear Sir', from K. Krofta, Vienna
- Item2 - Autograph letter, signed, to 'Dear Sir', from K. Krofta, Vienna
- Item3 - Autograph letter, signed, to J. R. Tanner from K. Krofta, Vienna
- Item4 - Autograph letter, signed, to J. R. Tanner from K. Krofta, Vienna
- Item5 - Autograph letter, signed, to J. R. Tanner from Czechoslovak Legation, London