| Archive Number: | 2012.40.0839 | |
| Title: | Layer IV cleaned. | |
| Negative: | Section ΞΞ 154 | |
| Date: | 24 Apr 1948 | |
| Notebook Page: | 788 | |
| Rating: | 2 | |
| Section: | ΞΞ | |
| References: | Image: 2009.03.0606 (Section ΞΞ 154) Notebook Page: ΞΞ-4-99 (pp. 787-788) Notebook Page: ΞΞ-5-14 (pp. 818-819) |