@misc{indiciaedc56eb13c330,
  title = {Possible variation of the gravitational constant over the elements.},
  author = {Gilvarry, J. J. and Muller, P. M.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720050103},
  note = {Source identifier: 19720050103}
}