@misc{1180796,
  author = {J A Swaffield},
  title = {An initial study of the application of the numerical method of characteristics to unsteady flow analysis in partially filled gravity drainage sized pipes:},
  year = {1981},
  month = {1981-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.81-2308},
  language = {en},
}