@misc{1170191,
  author = {R L Bowen and G W Cleek},
  title = {A new series of X-ray-opaque reinforcing fillers for composite materials ::progress report},
  year = {1971},
  month = {1971-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.RPT.10580},
  language = {en},
}