@misc{indiciaeb4acd1934379,
  title = {Upper limits on the atomic hydrogen abundance in 12 globular clusters.},
  author = {Kerr, F. J. and Knapp, G. R.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19720060580},
  note = {Source identifier: 19720060580}
}