1. Experimental facilities and measuring techniques in hypersonic flow;Holder;J. Roy. Aero. Soc.,1959
2. Experimental investigations of hypervelocity flight;Lukasiewicz,1958
3. The Princeton helium hypersonic tunnel and preliminary results above M=11;Bogdonoff;PUAED 260,1954
4. Some aspects of air-helium simulation and hypersonic approximations;Love;N.A.S.A. TN D-49,1959