@misc{indiciae6cebddcb28f8,
  title = {Orbital propellant depot system.},
  author = {Wilson, D. J. and Hale, D. V. and Whitacre, W. E.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720055165},
  note = {Source identifier: 19720055165}
}