TY - GEN AU - Nicodemus, Fred E C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 1977-01-01 05:01:00 DO - https://doi.org/10.6028/NBS.TN.910-3 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 1977 TI - Self-study manual on optical radiation measurements ::Part I--Concepts, Chapter 6 ER -