An investigation of the visual sampling behaviour of human observers. NASA Contract Rep NASA CR-434.

@article{Senders1966AnIO,
  title={An investigation of the visual sampling behaviour of human observers. NASA Contract Rep NASA CR-434.},
  author={J. W. Senders and J. I. Elkind and Mario C. Grignetti and Richard D. Smallwood},
  journal={NASA contractor report. NASA CR. United States. National Aeronautics and Space Administration},
  year={1966},
  pages={1-138}
}