https://www.cambridge.org/core/journals/radiocarbon/article/abs/ams-14c-dating-of-the-mayan-codex-of-mexico-revisited/476DEA751C1A75B274507450758D9537
AMS 14C DATING OF THE MAYAN CODEX OF MEXICO REVISITED | Radiocarbon | Cambridge Core
AMS 14C DATING OF THE MAYAN CODEX OF MEXICO REVISITED - Volume 62 Issue 6
of themayan codex