# External source check (HTAB-KEYS-20260831)

Checked 2026-09-04 with `scripts/verify-external-sources.py` (GET, follow redirects, 25s timeout). None of these pages audited this fixture. Machine log: [`external-source-check-HTAB-KEYS-20260831.json`](./external-source-check-HTAB-KEYS-20260831.json).

| Source | Requested URL | Final URL | HTTP | Title SHA-256 | Note | Use |
|---|---|---|---|---|---|---|
| P-value statement | https://www.amstat.org/asa/files/pdfs/p-valuestatement.pdf | https://www.amstat.org/asa/files/pdfs/p-valuestatement.pdf | 200 | — |  | Limits of significance-only interpretation |
| e-Handbook | https://www.itl.nist.gov/div898/handbook/ | https://www.itl.nist.gov/div898/handbook/ | 200 | d4a4bc3e6e009d42 |  | Statistical and experimental-design context |
| TR15 | https://unicode.org/reports/tr15/ | https://unicode.org/reports/tr15/ | 200 | 727467cc8b943710 |  | Text normalization and naming references |
| H3 | https://h3geo.org/docs | https://h3geo.org/docs/ | 200 | 15d4d55c376bd28d |  | Resolution and replay analogies |
| ISO 86134 | https://www.iso.org/standard/86134.html | https://www.iso.org/standard/86134.html | 403 | 301dc171e5fa8c5f | http 403 | Dated-document analogy |

Keep original requested URLs. Re-check at decision time.