TY - GEN AU - Hsia, Jack J AU - Wilmering, David B AU - Richmond, Joseph C C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1982-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.SP.260-79 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1982 TI - Standard Reference Materials:Second-surface mirror standards of spectral specular reflectance (SRM's 2023, 2024, 2025) ER -