@article{124266,
  author = {J Walker},
  title = {A Technique for Improving the Calibration of Large-Area Sphere Sources, SPIE},
  year = {1991},
  number = {1493},
  month = {1991-01-01},
  publisher = {Proc Calibration of Passive Remote Observing Optical and Microwave Instrumentation},
  language = {en},
}