Potomac River. Adjust claims along Potomac River, Anacostia River, and Rock Creek, report to accompany S. 2508 [authorizing Secretary of Interior, with approval of National Capital Park and Planning Commission and Attorney General, to make equitable adjustments of conflicting claims between United States and other claimants of lands along shores of Potomac River, Anacostia River, and Rock Creek in District of Columbia]; submitted by Mr. King.