@misc{indiciae03995c374a65,
  title = {Focusing anisotropy of solar cosmic rays},
  author = {Bieber, J. W. and Evenson, P. A. and Pomerantz, M. A.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19870025027},
  note = {Source identifier: 19870025027}
}