@misc{1181536,
  author = {James R Clifton and Erik D Anderson},
  title = {Nondestructive evaluation methods for quality acceptance of hardened concrete in structures:},
  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.80-2163},
  language = {en},
}