@misc{1174881,
  author = {Stephen P Pessiki and Nicholas J Carino},
  title = {Measurement of the setting time and strength of concrete by the impact-echo method:},
  year = {1987},
  month = {1987-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NBS.IR.87-3575},
  language = {en},
}