| Archive Number: | 2012.33.0645 | |
| Title: | Pumping well. | |
| Negative: | Section Ε 154 | |
| Date: | 13 Jun 1931 | |
| Notebook Page: | 239 | |
| Rating: | 2 | |
| Section: | Ε | |
| References: | Notebook: Ε-2 Notebook Page: Ε-2-30 (pp. 239-240) |
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