TY - JOUR AU - Catherine Cooksey AU - Maria Nadal AU - David Allen AU - Kai-Olaf Hauer AU - Andreas Hoepe C2 - Metrologia DA - 2015-05-01 DO - https://doi.org/10.1364/AO.54.004006 LA - en M1 - 54 PB - Metrologia PY - 2015 TI - Bidirectional reflectance scale comparison between NIST and PTB ER -