@misc{1147101,
  author = {Peter A Spellerberg and David A Savage},
  title = {A system for calibration of the Marshall compaction hammer:},
  year = {1994},
  month = {1994-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.5338},
  language = {en},
}