@article{9609,
  author = {J. Hsieh and J. Baird},
  title = {Level-Crossing Spectroscopy in 7^2S Thallium. I. Studies of Coherence-Narrowing, Collision-Broadening, and Buffer-Gas Effects},
  year = {1972},
  journal = {Physical Review A},
  volume = {6},
  pages = {141-152},
  month = {Jan-07-1972},
  issn = {0556-2791},
  url = {http://link.aps.org/doi/10.1103/PhysRevA.6.141},
  doi = {10.1103/PhysRevA.6.141},
}