Title Multiple surface uses of the public domain : hearings before the Committee on Interior and Insular Affairs, United States Senate, Eighty-fourth Congress, first session, on S. 1713, a bill to amend the Act of July 31, 1947 (61 Stat. 681), and the mining laws to provide for multiple use of the surface of the same tracts of the public lands, and for the other purposes, May 18 and 19, 1955.