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Resources share the relationship sub focus to 20th century
- Women motorcyclists -- United States -- History -- 20th century -- Biography -- Juvenile literature
- Appalachian Region -- History -- 20th century -- Fiction
- Destroyers (Warships) -- United States -- History -- 20th century
- Intelligence service -- United States -- History -- 20th century
- Literary forgeries and mystifications + History -- 20th century
- Civil rights movements + History -- 20th century -- Poetry
- Japanese American soldiers + History -- 20th century
- Tulsa (Okla.) -- Race relations -- History -- 20th century -- Juvenile literature
- Hotel Metropol (Moscow, Russia) -- History -- 20th century
- Women's rights -- United States -- History -- 20th century -- Juvenile literature
- California, Southern -- History -- 20th century -- Fiction
- Cabanatuan (Philippines) -- History, Military -- 20th century
- Key West (Fla.) -- History -- 20th century -- Juvenile fiction
- United States -- Politics and government -- 20th century
- Baseball -- United States -- History -- 20th century
- Great Britain -- Social life and customs -- 20th century
- Novelists, English -- 20th century -- Diaries
- African Americans + Civil rights -- Alabama -- Montgomery -- History -- 20th century
- Ireland -- History -- 20th century -- Fiction
- Women -- Kentucky -- Social conditions -- 20th century -- Fiction
- Cape Cod (Mass.) -- Social life and customs -- 20th century
- Progressivism (United States politics) + History -- 20th century
- Poland -- History -- 20th century -- Juvenile fiction
- Young women + Conduct of life -- 20th century -- Drama
- Racism -- United States -- History -- 20th century
- Virginia -- History -- 20th century -- Fiction
- Civil rights movement -- History -- 20th century -- Juvenile literature
- Osage County (Okla.) -- History -- 20th century
- Texas -- Social conditions -- 20th century -- Fiction
- West Virginia -- History -- 20th century -- Fiction
- Magic -- France -- Paris -- History -- 20th century
- Poland -- History -- 20th century -- Comic books, strips, etc
- Clothing and dress + Social aspects -- United States -- History -- 20th century -- Juvenile literature
- Moscow (Russia) -- Social life and customs -- 20th century
- Texas -- Social life and customs -- 20th century -- Fiction
- Women + Suffrage -- Tennessee -- History -- 20th century
- Migration, Internal -- United States -- History -- 20th century
- Novelists, American -- 20th century -- Family relationships
- Women authors, American -- 20th century -- Biography -- Juvenile literature
- Denver (Colo.) -- 20th century -- Fiction
- Greenwood (Tulsa, Okla.) -- Race relations -- History -- 20th century
- Birmingham (Ala.) -- History -- 20th century -- Fiction
- Greenwood (Tulsa, Okla.) -- History -- 20th century -- Juvenile literature
- Bohemianism -- Massachusetts -- Cape Cod -- History -- 20th century
- United States, Congress, House -- History -- 20th century
- Isolationism -- United States -- History -- 20th century
- Great Britain -- Social conditions -- 20th century -- Drama
- Bucharest (Romania) -- History -- 20th century -- Juvenile fiction
- New Jersey -- History -- 20th century -- Juvenile fiction
- Protest movements + History -- 20th century