Massachusetts. General Court. Committee on Railways and Canals

United States. Central Intelligence Agency

American National Red Cross

American School of Correspondence

Library of Congress. Copyright Office

Thomas K. Ford

United States. Council of National Defense. Highways Transport Committee

United States. Department of the Interior

United States. War Department

United States. Warren Commission

United States. Work Projects Administration

Abraham Lincoln

Alexis de Tocqueville

Archibald Henry Grimké

Charles Sumner

Frédéric Bastiat

Frederick Douglass