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Resources share the relationship sub focus to 20th century
- Dogs in the performing arts + History -- 20th century
- Women novelists, American -- 20th century -- Biography
- Fond du Lac (Wis.) -- History -- 20th century -- Fiction
- Riots -- Oklahoma -- Tulsa -- History -- 20th century
- Authors, American -- 20th century -- Anecdotes
- Yukon -- History -- 20th century -- Fiction
- Chichi Island (Japan) -- History, Military -- 20th century
- London (England) -- Social conditions -- 20th century
- Women and literature -- Great Britain -- History -- 20th century
- Prairie chickens + Conservation -- Wisconsin -- History -- 20th century
- Oklahoma -- History -- 20th century -- Fiction
- African Americans + Civil rights -- Alabama -- Selma -- History -- 20th century
- Women + Social conditions -- 20th century -- Fiction
- Greenwood (Tulsa, Okla.) -- Race relations -- History -- 20th century
- Ireland -- Social life and customs -- 20th century -- Fiction
- Disabled veterans + Rehabilitation -- Great Britain -- History -- 20th century
- African Americans + Civil rights -- Alabama -- History -- 20th century
- Floods -- Mississippi River Valley -- History -- 20th century -- Fiction
- Shipwrecks -- Great Lakes (North America) -- History -- 20th century
- Child slaves -- Korea -- History -- 20th century -- Comic books, strips, etc
- Los Angeles (Calif.) -- Social life and customs -- 20th century
- Champagne-Ardenne (France) -- History -- 20th century -- Fiction
- Paris (France) -- 20th century -- Fiction
- Businesspeople -- 20th century -- Biography
- Espionage -- Great Britain -- History -- 20th century -- Fiction
- African Americans + Civil rights -- North Carolina -- History -- 20th century -- Juvenile literature
- United States -- History, Military -- 20th century -- Fiction
- California -- History -- 20th century -- Fiction
- Arkansas -- History -- 20th century -- Fiction
- Jamaica -- Social life and customs -- 20th century -- Fiction
- American Dream -- 20th century -- Fiction
- Social change + History -- 20th century
- African American women authors -- 20th century -- Biography
- Fires -- Massachusetts -- Boston -- History -- 20th century
- Technology + History -- 20th century
- England -- Social conditions -- 20th century -- Fiction
- Social classes + History -- 20th century
- Authors, American -- 20th century -- Biography -- Poetry
- Oregon -- Social life and customs -- 20th century -- Fiction
- Novelists, American -- 20th century -- Family relationships
- Plains (Ga.) -- Social life and customs -- 20th century
- Manchuria (China) -- History -- 20th century -- Fiction
- Race discrimination + History -- 20th century
- Espionage, American + History -- 20th century
- Civil rights movements -- Alabama -- Birmingham -- History -- 20th century
- Maui (Hawaii) -- History -- 20th century
- Russians -- France -- Paris -- 20th century -- Fiction
- Air pilots, Military + History -- 20th century
- Crime -- Wisconsin -- History -- 20th century -- Case studies
- Wealth + Moral and ethical aspects -- 20th century -- Fiction