Efectos negativos de la reforma tributaria colombiana de 2016 sobre las entidades sin ánimo de lucro –ESAL

by Paulina Andrea Chica Bertel, Guillermo Enrique Martínez Mangones
Published 2020-12-01

Contaminant Removal and Precious Metal Recovery by Lateral Channel Filtration in Mining-Impacted Alluvial Floodplains

by William P. Johnson, Eddy Pazmiño, Logan Frederick, Cesar Ron, Andrea Chica, Luis Tapia
Published 2020-11-01