TY - JOUR AU - VĂ©lez-Cardona, Waldemiro PY - 2017/03/23 Y2 - 2024/03/28 TI - Editorial JF - Revista Umbral JA - Rev. Umbral VL - 0 IS - 4 SE - Editorial DO - UR - https://revistas.upr.edu/index.php/umbral/article/view/8442 SP - 1-4 AB - ER -