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| North Monument Base, detail ... southeast 1833 ... 6 May 1952 |
| North Monument Base, detail ... AMS southeast 1833 Horizontal (normal) ... 6 May 1952 |
| View of terme base as found ... AMS northeast 1432 Horizontal (normal) ... May 1951 |
| View of terme base as found ... AMS northwest 1433 Horizontal (normal) ... May 1951 |
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