@misc{1191886,
  author = {Thora M Plitt},
  title = {Circular of the Bureau of Standards no. 423::microscopic methods used in identifying commercial fibers},
  year = {1939},
  month = {1939-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CIRC.423},
  language = {en},
}