Description12 ceh.png Español: Glifo del calendario Haab Date 1 June 1915 Source An Introduction to the Study of the Maya Hieroglyphs (1905) Author Sylvanus
GLAMwiki and Wikidata for (new) employees of the Koninklijke Bibliotheek, 12 Sept, 15 Okt and 28 Nov 2019. Dutch Basiscursus Wikipedia, Wikimedia en Wikidata