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- Robert A. Dahl (7)
- Robert A. Heinlein (485)
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- Robert Adam (2)
- Robert Adams (78)
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- Robert Agostinelli (3)
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- Robert Alan (2)
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- Robert Anderson (5)
- Robert Andrews Millikan (23)
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- Robert Anton Wilson (161)
- Robert Ardrey (25)
- Robert Aris Willmott (13)
- Robert Asenla Odyuo (1)
- Robert Ashley (2)