Investigation of concentration of economic power. hearings before the Temporary National Economic Committee, Congress of the United States, Seventy-sixth Congress, first session pursuant to Public Resolution no. 113 (Seventy-fifth Congress), authorizing and directing a select committee to make a full and complete study and investigation with respect to the concentration of economic power in, and financial control over, production of goods and services. Part 7, Milk industry : Poultry industry, March 9, 10, and 11, May 1, 2, and 3, 1939 :