@misc{indiciaec3598b3f9249,
  title = {Pioneer imaging photopolarimeter optical system.},
  author = {Pellicori, S. F. and Russell, E. E. and Watts, L. A.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730047583},
  note = {Source identifier: 19730047583}
}