| Rollin' on Down the Line: Lady Bird Johnson's 1964 Whistle-Stop Tour for Civil Rights |
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| Roll the Dice |
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| Rosalyn Sussman Yalow |
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1.1 |
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| Rosa Parks |
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1.6 |
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| Rosa Parks SP |
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1.7 |
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| Rosa Parks: The Making of a Myth |
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| Roswell |
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3.6 |
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| Rosy Wolf Snails Invade Pacific Islands |
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4.0 |
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| Rotary Clubs |
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5.3 |
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| Round and Rare: Giant Panda |
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1.2 |
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| Rover |
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| Roving the Red Planet |
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| Ruby Bridges |
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1.7 |
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| Ruby-Throated Hummingbird Migration |
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3.7 |
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| Rugby World Cup |
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| Ruth Bader Ginsburg |
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1.6 |
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| Saber-Toothed Cat |
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3.3 |
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| Sacagawea |
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1.5 |
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| Sacagawea SP |
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1.7 |
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| Sadness |
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