| Archive Number: | 2012.47.0831 | |
| Title: | Mass of earth north of the northwest corner. Looking down and north. | |
| Negative: | Section Φ 235 | |
| Rating: | 2 | |
| Section: | Φ | |
| References: | Notebook: Φ-7 Notebook Page: Φ-7-38 (pp. 1265-1266) |
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