@misc{indiciae965b43fadca6,
  title = {Positronium reflection and positronium beams},
  author = {Weber, M. and Tang, S. and Khatri, R. and Berko, S. and Canter, K. F. and Lynn, K. G. and Mills, A. P., Jr. and Roellig, L. O. and Viescas, A. J.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900009664},
  note = {Source identifier: 19900009664}
}