Letter from Robert M. Sayre to Commissioner Leland H. Hewitt re: Mexican Complaint of Air & Water Pollution by Peyton Packing & Casuco Companies of El Paso, June 30, 1961
written by United States. Department of State, in General Records of the Department of State, 1763 - 2002 (RG59). Records Relating to the Chamizal Dispute with Mexico, 1947 - 1963 (A1 5145), of United States. National Archives and Records Administration. Federal Records (1961), Box 1, Chamizal 1956- , 3 page(s)