Dr J Seddon; Dr J E Gordon; Dr R R Jamison (1962). "Supersonic Hypersonic Flight". UK Government (via Imperial War Museum). Archived from the original on 24 December 2012. Retrieved 17 October 2012.
Gasch, Matthew; Johnson, Sylvia; Marschall, Jochen (2008). "Thermal Conductivity Characterization of Hafnium Diboride-Based Ultra-High-Temperature Ceramics - Gasch -". Journal of the American Ceramic Society. 91 (5): 1423–1432. doi:10.1111/j.1551-2916.2008.02364.x.
iwmcollections.org.uk
film.iwmcollections.org.uk
Dr J Seddon; Dr J E Gordon; Dr R R Jamison (1962). "Supersonic Hypersonic Flight". UK Government (via Imperial War Museum). Archived from the original on 24 December 2012. Retrieved 17 October 2012.