1. R. B. LIGHTFOOT, The heavy assault transport helicopter. Presented as Cierva Memorial Lecture at Royal Aeronautical Society, London, England, Oct. 29, 1965.
2. Evaluation of titanium forging alloys—Ti-6Al-6V-2Sn and Ti-13V-11Cr-3Al;MATUSOVICH,1967
3. An evaluation of the properties of titanium and titanium alloys;WEINBERG,1957
4. Manual on the machining and grinding of titanium and titanium alloys;OLOFSON,1957
5. Corrosion properties of titanium and its alloys;SCHLAIN;U.S. Department of the Interior, Bureau of Mines Bulletin,1964