20TH CENTURY AMERICAN HISTORY
- American Cultural History - Information from Smithsonian
- American Memory Project of the Library of Congress
- Historical Atlas of the 20th Century
- History Channel
- The People's Century (PBS)
- Time Magazine (profiles of 100 most influential people of the twentieth century)
- Eyewitness to History (20th century)
- US History Index (maintained by the U of Kansas)
- What Did You Do in the War Grandma?