Sixth semiannual report on activities under Public Law 480, 83d Congress, as amended. Message from the President of the United States transmitting the sixth semiannual report on activities carried on under Public Law 480, 83d Congress, as amended, outlining operations under the act during the period January 1 through June 30, 1957. July 22, 1957. -- Referred to the Committee on Agriculture. [electronic resource]