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| Southeast corner of Section A, from the southwest ... AMS 81 Horizontal (normal) ... 12 Jun 1931 |
| Southeast corner, from the southwest ... AMS 81 Horizontal (normal) ... 13 Jun 1931 |
| Middle east, from the west ... AMS 81 Horizontal (normal) ... 13 Jun 1931 |
| Northern part, from the west ... AMS 81 Horizontal (normal) ... 13 Jun 1931 |
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