Title: First International Congress on sanitary aviation to be held at Paris, France, 1929. Message from the President of the United States transmitting report by the Secretary of State recommending that Congress authorize an appropriation of $1,000 for the payment of expenses of delegates of the United States to the First International Congress on sanitary aviation to be held at Paris, France, in 1929
Subjects: Aeronautics, Commercial, Sewage disposal plants