Lists of visits of Presidents of the United States to foreign countries, 1789-1983.

Mode of access: Internet.

The life of George Washington.

Mode of access: Internet.

Wolf Trap Farm Park and Mary McLeod Bethune Council House : hearing before the Subcommittee on Public Lands and Reserved Water of the Committee on Energy and Natural Resources, United States Senate, Ninety-seventh Congress, second session, on S. 1999 ... S. 2436 ... July 2, 1982.

"Publication no. 97-111."