| 1. | Chronology of 1901 | | | Describes events and people of that year. Categories include art, discoveries, labor, music, politics, and war. www.jagdishpurohit.com |
| 3. | Twentieth Century | | | Killeen High School's World History course notes, with activities, links and lesson plan. killeenroos.com |
| 5. | Decades in 20th Century America | | | A collection of print and online sources for each decade, maintained by the Alameda County (CA) Library. www.aclibrary.org |
| 6. | Berkeley Campaign Art | | | Images of political posters reflecting Berkeley's progressive-left community and culture from the 1970s onward. berkeleycampaignart.homestead.com |
| 7. | JN Ding Darling Foundation | | | Read chronicled politics, thoughts, and trends of the 20th century. Winner of two Pulitzer prizes for the drawing of editorial cartoons. www.ding-darling.org |
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