TY - GEN AU - David W Allen AU - Edward A Early AU - Benjamin K Tsai AU - Catherine C Cooksey C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2011-01-01 05:01:00 DO - https://doi.org/10.6028/NIST.SP.250-69 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2011 TI - NIST measurement services ::regular spectral transmittance ER -