Train wreck test for steel sphere to carry helium
Helium purification plant of Zeppelin station in Frankfurt
Helium purification plant of Zeppelin station in Frankfurt
Captive Testing of Missile 14A at Mstsan-1, Edwards Air Force Base, Edwards, California
Maritime Gas Cooled Reactor Project. Metallurgical Program Progress Report, September 1, 1959
An Experimental Investigation of Stall Flutter of a Model Helicopter Rotor in Forward Flight