World War, 1939-1945--Participation, Civilian--United States--Poster--Specimens 3 Botanical specimens--Collection and preservation 2 Botanical specimens--Drying 2 Hitler, Adolf, 1889-1945--Caricatures and cartoons 2 National security--1939-1945--United States--Posters--Specimens 2 Patriotism--United States--Posters--Specimens 2 Plant collecting 2 more ... Printing--Specimens 2 Savings bonds--United States--Posters--Specimens 2 United States--Office of War Information--Division of Public Inquiries 2 War posters, American--1939-1945--Specimens 2 World War, 1939-1945--Economic aspects--United States--Posters--Specimens 2 World War, 1939-1945--Food supply--United States--Posters--Specimens 2 World War, 1939-1945--Propaganda--Posters--Specimens 2 World War, 1939-1945--Social aspects--United States--Posters--Specimens 2 World War, 1939-1945--United States--Posters--Specimens 2 World War, 1939-1945--War work--United States--Posters--Specimens 2 Botanical specimens--United States--Pennsylvania 1 Botany--Nomenclature 1 Businesswomen--Pennsylvania--Philadelphia 1 Ethnic press--Pennsylvania--Philadelphia 1 Europe--Description and travel 1 Exotic animal exportation--India 1 Higher Education--Yale--Personal Accounts--19th Century 1 Human skulls 1 Lea, Henry C. 1 Mussolini, Benito, 1883-1945--Caricatures and cartoons 1 Polish Americans--Newspapers 1 Soldiers--Pennsylvania--Philadelphia--20th century 1 Tojo, Hideki, 1884-1948--Caricatures and cartoons 1 Type and type-founding--Philadelphia (Pa)--19th century 1 Uncle Sam (Symbolic character)--Posters--Specimens 1 United States--History--World War, 1939-1945 1 War posters, American--1914-1918--Specimens 1 Women's Land Army of America 1 World War, 1914-1918--Finance--United States--Posters--Specimens 1 World War, 1914-1918--United States--Posters--Specimens 1 World War, 1939-1945 1 World War, 1939-1945--Memorabilia 1 World War, 1939-1945--Operational rations (Military supplies)--United States 1 less ...