1. Centro Nacional de Investigación sobre la Evolución Humana (CENIEH), 09002 Burgos, Spain
2. Research Group Natural Heritage and Applied Geography (PANGEA), Universidad de Valladolid, 47011 Valladolid, Spain
3. Department of Geography, Universidad de Valladolid, 47011 Valladolid, Spain
4. Research Group Engineering, Territory and Heritage (NEXUS), Universidad de Extremadura, 10003 Cáceres, Spain
5. Department of Geography, Urban and Regional Planning, Universidad de Cantabria, 39005 Santander, Spain
6. Department of Geography and Geology, Universidad de León, 24071 León, Spain