Mayors--Pennsylvania--Philadelphia 2 Philadelphia (Pa.)--Social problems 2 Political cartoons--20th century 2 Political cartoons--Pennsylvania--Philadelphia--20th century 2 World War, 1914-1918--Caricatures and cartoons 2 World War, 1939-1945--Caricatures and cartoons 2 World politics--Caricatures and cartoons 2 more ... Accounts--19th century 1 Advocacy organizations--Philadelphia--20th century 1 Affirmative action programs--Government policy--United States--History--20th century 1 American Academy--Rome 1 American wit and humor--Periodicals 1 Art and artists--20th century 1 Art and artists--Pennsylvania--Philadelphia 1 Artists--Pennsylvania--Philadelphia 1 Built environment--Pennsylvania--Philadelphia--20th century 1 Business and manufacturing--Pennsylvania--Philadelphia--20th century 1 Business mergers and acquisitions--20th century 1 Business--History--Pennsylvania--Philadelphia--20th century 1 China--Description and Travel--images 1 City planning and development--Pennsylvania--Philadelphia--20th century 1 City planning--Pennsylvania--Philadelphia 1 City planning--Pennsylvania--Philadelphia--20th century 1 Coal--Trade--19th century 1 Consumer activism--20th century 1 Current events--United States--HIstory--20th century 1 Department stores 1 Education, Urban--Pennsylvania--Philadelphia 1 Education, Urban--United States--Administration 1 Education--United States--History--20th century 1 Education--United States--Management 1 Egypt--Description and Travel--images 1 Ethnic groups--Comic books, strips, etc 1 Ethnic groups--United States--Attitudes 1 High speed ground transportation 1 Lawyers--Pennsylvania--Philadelphia--20th century 1 Minorities--United States--Attitudes 1 Municipal charters--Pennsylvania--Philadelphia 1 Municipal government--Pennsylvania--Philadelphia 1 Municipal officials and employees--Pennsylvania--Philadelphia 1 less ...