UNE-EN ISO 4037-3
Radiological protection - X and gamma reference radiation for calibrating dosemeters and doserate meters and for determining their response as a function of photon energy - Part 3: Calibration of area and personal dosemeters and the measurement of their response as a function of energy and angle of incidence (ISO 4037-3:2019) (Endorsed by Asociación Española de Normalización in March of 2021.)