A. Ulmer

Geochemical analysis of Late Classic and Post Classic Maya marketplace activities at the Plazas of Cobá, Mexico

Eric G. Coronel, Scott R. Hutson, Aline Magnoni, 2015 .

Geoarchaeology and tropical forest soil catenas of northwestern Belize

Duncan Cook, C. Doyle, T. Beach, 2018 .

Indications of Ancient Maya Soil Resource Management in Northern Belize

A. Ulmer, 2015 .