APA

United States, . (1957). Chesapeake and Ohio Canal Historical Park: hearing before Subcommittee on Public Lands, 85th Congress, 1st session, on S. 77, June 12, 1957. [Washington, D.C.]: .

Chicago

United States, . 1957. Chesapeake and Ohio Canal Historical Park: hearing before Subcommittee on Public Lands, 85th Congress, 1st session, on S. 77, June 12, 1957. [Washington, D.C.]: .

Harvard

United States, . (1957). Chesapeake and Ohio Canal Historical Park: hearing before Subcommittee on Public Lands, 85th Congress, 1st session, on S. 77, June 12, 1957. [Washington, D.C.]: .

MLA

United States, . Chesapeake and Ohio Canal Historical Park: hearing before Subcommittee on Public Lands, 85th Congress, 1st session, on S. 77, June 12, 1957. [Washington, D.C.]: . 1957.