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
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
Pneumatic Control Rack Assemblies. Part No. 1541590 and 1503255. Operation and Service Manual