International Boundary and Water Commission, United States and Mexico : hearings before the Subcommittee on Inter-American Affairs of the Committee on Foreign Relations, House of Representatives, Eighty-eighty Congress, second session on H.R. 9444 and H.R. 9445, bills authorizing maintenance of flood and arroyo sediment control dams and related works to facilitate Rio Grande canalization project and authorizing appropriations for that purpose and H.R. 7419, a bill to authorize the conclusion of agreements with Mexico for joint construction operation, and maintenance of flood control works on the lower Colorado River, in accordance with the provisions of Article 13 of the 1944 Water Treaty with Mexico, and for other purposes. June 23 and 24, 1964.