@misc{indiciaec099d24564b5,
  title = {Radio-Wave Propagation and Electromagnetic Surface Waves.},
  author = {P S Epstein},
  year = {1947},
  doi = {10.1073/pnas.33.6.195},
  url = {https://pubmed.ncbi.nlm.nih.gov/16588742/},
  note = {Source identifier: 16588742}
}