@article{10507,
  author = {J. Bergquist and S. Lee and John Hall},
  title = {Saturated Absorption with Spatially Separated Laser Fields: Observation of Optical "Ramsey" Fringes},
  year = {1977},
  journal = {Physical Review Letters},
  volume = {38},
  pages = {159-162},
  month = {Jan-01-1977},
  issn = {0031-9007},
  doi = {10.1103/PhysRevLett.38.159},
}