Aeronautics, Commercial--Law and legislation--United States 1 Airports--Pennsylvania 1 Ambassadors--United States 1 Ambassadors’ spouses 1 Ancient Arabic Order of the Nobles of the Mystic Shrine for North America 1 Armories--Pennsylvania 1 City planning--Pennsylvania--Philadelphia 1 more ... Democratic Party (U.S.) 1 Diplomatic and consular service, American 1 Education, Urban--Pennsylvania--Philadelphia 1 Education, Urban--United States--Administration 1 Education--United States--History--20th century 1 Education--United States--Management 1 Foreign Relations--United States--Europe--1935-1944 1 Governments in exile 1 High speed ground transportation 1 Mayors--Pennsylvania--Philadelphia 1 Municipal charters--Pennsylvania--Philadelphia 1 Municipal government--Pennsylvania--Philadelphia 1 Municipal officials and employees--Pennsylvania--Philadelphia 1 Nazi propaganda--Poland 1 Pennsylvania. Governor’s Committee for Transportation 1 Philadelphia (Pa.)--City planning 1 Philadelphia (Pa.)--Civic improvement 1 Philadelphia (Pa.)--Race relations--History--20th century 1 Philadelphia (Pa.)--Social problems 1 Poland--Foreign relations--United States--Sources 1 Segregation in education--Law and legislation--United States--History 1 Slavery--Law and legislation--United States--History 1 Slavery--United States--History 1 Social reformers--Pennsylvania--Philadelphia 1 Supreme Court justices 1 United States Army 1 United States--Foreign relations--Poland--Sources 1 United States--Foreign relations--Spain--Sources 1 United States--History--Cold War 1 Urban development 1 Urban policy--Pennsylvania--Philadelphia 1 Urban renewal--Pennsylvania--Philadelphia 1 World War I. 1 less ...