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| A Selective Bibliography of Exploration Relating to the United States | 103 |
| October 2013 | November 2013 | December 2013 | January 2014 | February 2014 | March 2014 | April 2014 | |
| A Selective Bibliography of Exploration Relating to the United States | 1 | 2 | 1 | 3 | 1 | 6 | 2 |
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| A Selective Bibliography of Exploration.pdf | 58 |
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| United States of America | 42 |
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