Safety in aviation (study of thunderstorms) and development of lighter than air rigid airships. Hearing before a subcommittee of the committee on Interstate and Foreign Commerce, United Sates Senate, Eightieth Congress, second session, on S. 2456, a bill to provide safety in aviation and to direct an investigation of the causes and characteristics of thunderstorms, and S. 2464, a bill to authorize the United States Maritime Commission to provide for the development of lighter than air rigid airships for commercial use. May 17, 1948.

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