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| Administration | Thomas Jefferson Library | Ward E. Barnes Library | St. Louis Mercantile Library |
| University Libraries Administration Office | |
| Phone (314) 516-5050 | |
| Postal Address: | Thomas Jefferson Library
One University Boulevard St. Louis, MO 63121-4400 |
| Thomas Jefferson Library |
| Reference Desk (314) 516-5060 |
| Circulation Desk (314) 516-5057 |
| Thomas Jefferson Library Staff |
| Ward E. Barnes Library |
| Reference Desk (314) 516-5576 |
| Circulation Desk (314) 516-5572 |
| Ward E. Barnes Library Staff |
| St. Louis Mercantile Library |
| Reference Desk (314) 516-7240 |
| Reading Room (314) 516-7247 |
| St. Louis Mercantile Library Staff |
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