@misc{1161656,
  author = {Stanley Ruthberg},
  title = {Graphical solution for the helium leak detector and radioisotope methods of hermetic test:},
  year = {1982},
  month = {1982-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.SP.400-73},
  language = {en},
}