Letter from the Chairman of the Federal Trade Commission transmitting in response to Senate Resolution, No. 34, Sixty-ninth Congress, special session, a report on the development and importance of the cooperative movement, together with the results of the inquiry as it related to illegal interferences with the formation and operation of cooperatives and a report of the results of a study of comparative costs, prices, and marketing practices, as between cooperative marketing organizations and other types of marketers and distributors handling farm products.