1. Private correspondence with The United Steel Companies Ltd.
2. Private correspondence with Firth-Vickers Stainless Steels Ltd.
3. Private correspondence with Samuel Osborn and Co. Ltd.
4. Thermal Expansion of Heat-resisting Iron Alloys;Austin;Ind. Eng. Chem.,1933
5. Physical Constants of Some Commercial Steels at Elevated Temperatures. Butterworths Scientific Publications, London, 1953.