@misc{1192701,
  author = {Lawrence I Knab and William L Galligan and B A Bendtsen and John F Senft},
  title = {A Study of lumber used for bracing trenches in the United States:},
  year = {1980},
  month = {1980-01-01 05:01:00},
  publisher = {Building Science Series, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.BSS.122},
  language = {en},
}