Kiefer, Ana Paula, and Adriano Severo Figueiró. 2023. “Proposal for the Geotouristic Route of Testimonies Hills – Municipality of Agudo, Quarta Colônia Unesco World Geopark – RS-BR”. Physis Terrae - Ibero-Afro-American Journal of Physical Geography and Environment 5 (2-3). Guimarães, Portugal:19-33. https://doi.org/10.21814/physisterrae.5556.