| Title: | Great Drain Bridge; Soft Fill above Later Great West Drain | |
| Keyword: | From Annotation | |
| Date: | 22-23 Apr 1948 | |
| Section: | ΠΠ | |
| References: | Notebook: ΠΠ-6 Notebook: ΠΠ-8 Notebook Page: ΠΠ-6-21 (pp. 1032-1033) Notebook Page: ΠΠ-8-6 (pp. 1402-1403) |
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