@misc{indiciaed29dc1d13183,
  title = {Gravity research at Cottrell observatory},
  author = {Tuman, V. S. and Anderson, J. D. and Lau, E. L.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770068662},
  note = {Source identifier: 19770068662}
}