@misc{1189186,
  author = {Robert E Stoltenberg},
  title = {Detection of human intruders by low frequency sonic interferometric techniques:},
  year = {1974},
  month = {1974-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.74-364},
  language = {en},
}