@misc{indiciae2fec511507f5,
  title = {Nonlinear spectroscopy.},
  author = {R G Brewer},
  year = {1972},
  doi = {10.1126/science.178.4058.247},
  url = {https://pubmed.ncbi.nlm.nih.gov/5078247/},
  note = {Source identifier: 5078247}
}