1. 1 Abraham, G.D. (1916). On Alpine Heights and British Crags. Methuen, London.
2. 2 Abraham, G.D. (1933). Modern Mountaineering. Methuen, London.
3. Report on rope;Anonymous;Alpine Journal,1931
4. Climbing In Britain. Penguin Books, Harmondsworth. (Barford was killed by a stonefall in the Dauphiné on 23 July 1947 in a party with W. H. Murray and M. Ward;Barford;See Alpine Journal,1946
5. The strength of ropes;Bird;New Series 4,1931