@misc{indiciae6f21eea8937b,
  title = {Interplanetary Trajectories, Encke Method (ITEM)},
  author = {Whitlock, F. H. and Wolfe, H. and Lefton, L. and Levine, N.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720000603},
  note = {Source identifier: 19720000603}
}