@misc{indiciae4be3fa5ee462,
  title = {User's manual for RAVFAC - A radiation view factor digital computer program},
  author = {Lovin, J. K. and Lubkowitz, A. W.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19700017765},
  note = {Source identifier: 19700017765}
}