@misc{indiciaeca034e393285,
  title = {Policy opportunities},
  author = {Mccray, Richard and Ostriker, Jeremiah P. and Acton, Loren W. and Bahcall, Neta A. and Bless, Robert C. and Brown, Robert A. and Burbidge, Geoffrey and Burke, Bernard F. and Clark, George W. and Cordova, France A.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910023715},
  note = {Source identifier: 19910023715}
}