@misc{indiciaeccf83fde376f,
  title = {STRESS DIFFERENCES AND THE REFERENCE ELLIPSOID},
  author = {Kaula, W. M. and Okeefe, J. A.},
  year = {1963},
  url = {https://ntrs.nasa.gov/citations/19630029020},
  note = {Source identifier: 19630029020}
}