@misc{1191781,
  author = {Mary Grace Blair and Elmer L Peffer},
  title = {Circular of the Bureau of Standards no. 449::hydrometer correction tables and thermal-density coefficients for vegetable tanning extracts},
  year = {1945},
  month = {1945-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.CIRC.449},
  language = {en},
}