The driving force behind the "upd" movement are enthusiasts on forums like:
If you need updated historiography (current historical interpretations) rather than the original 1980s texts, consider: pdf cuadernos historia 16 upd
Because Grupo 16 no longer exists, copyright is murky. However, here are the most useful current access points: The driving force behind the "upd" movement are
La popularidad de estos PDFs en la UPD revela mucho sobre la dinámica interna de la universidad: Evaluación: rúbrica por competencia (conocimiento