Scope and Contents Yorktown National Military Park June 6, 1921 ...In the Senate of the United States.  June 6, 1921.. A bill declaring the battle field of Yorktown a national military park...7 p.  28 cm.  1 piece. 1921 Hearings before the subcommittee of the committee on appropriations United States Senate...on a bill declaring the battle field of Yorktown a national military park...Washington, Government printing office, 1921.  16 p.  23 1/2 cm.  1 piece. Navy Mine Depot Navy Mine Depot, Yorktown, Virginia...