| Title: | Building A; Room 2; Tank or Basin underneath | |
| Keyword: | From Annotation | |
| Date: | 6 May 1949 | |
| Section: | ΠΠ | |
| References: | Notebook: ΠΠ-6 Notebook: ΠΠ-10 Notebook Page: ΠΠ-6-40 (pp. 1070-1071) Notebook Page: ΠΠ-10-77 (pp. 1944-1945) Notebook Page: ΠΠ-10-86 (pp. 1962-1963) |