@misc{1191696,
  author = {Francis W Glaze and Clarence H Hahner},
  title = {Circular of the Bureau of Standards no. 469::optical glass at the National Bureau of Standards},
  year = {1948},
  month = {1948-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CIRC.469},
  language = {en},
}