Columbia subject headings:
Baltimore-Washington Parkway (Md.)--History.
George Washington Memorial Parkway (Va. and Washington, D.C.)--History.
Parkways--Washington Metropolitan Area--History.
Rock Creek and Potomac Parkway (Washington, D.C.)--History.
Suitland Parkway (Md. and Washington, D.C.)--History.
Harvard subject headings:
Baltimore-Washington Parkway (Md. and Washington, D.C.)
George Washington Memorial Parkway (Va. and Washington, D.C.)
Parkways--Washington Metropolitan Area.
Rock Creek and Potomac Parkway (Washington, D.C.)
Suitland Parkway (Md. and Washington, D.C.)
Princeton subject headings:
Baltimore-Washington Parkway (Md.)--History.
George Washington Memorial Parkway (Va. and Washington, D.C.)--History.
Parkways--Washington Metropolitan Area--History.
Rock Creek and Potomac Parkway (Washington, D.C.)--History.
Suitland Parkway (Md. and Washington, D.C.)--History.