The involvement of U.S. private enterprise in developing countries. : Hearings before the subcommittee on Foreign Economic Policy of the committee on Foreign Affairs, House of Representatives, Ninetieth Congress, first session. July 18; August 1, 8-9. 27; September 12-13, 19; and October 25, 31, 1967. (U.S. Govt. Print. Off, 1968)