Geahča maid: The maya and tzental calendars. Comprising the complete series of days /
- The numeration, calendar systems and astronomical knowledge of the mayas /
- The native calendar of Central America and Mexico, a study in linguistics and simbolism /
- Maya hieroglyphic writing; an introduction /
- Maya hieroglyphic writing; introduction /
- El calendario maya : su origen y su filosofía /
- El calendario maya : su origen y su filosofía /
Fáddá: CALENDARIO MAYA
- The numeration, calendar systems and astronomical knowledge of the mayas /
- The maya and tzental calendars. Comprising the complete series of days /
- Tiempo y Realidad en el pensamiento maya /
- The native calendar of Central America and Mexico, a study in linguistics and simbolism /
- Los signos de los días. Memoria presentada al XIII Congreso de Americanistas /
- Maya hieroglyphic writing; an introduction /