@article{125416,
  author = {Leonard Hanssen and K Snail},
  title = {Nonimaging Optics and the Measurement of Diffuse Reflectance},
  year = {1991},
  number = {1528},
  month = {1991-01-01},
  publisher = {SPIE Proc Nonimaging Optics Maximum Efficiency Light Transfer},
  language = {en},
}