@misc{1198531,
  author = {L J Kaetzel and J R Clifton and D P Bentz},
  title = {Integrating knowledge for the identification of cracks in concrete using an expert system shell and extensions:},
  year = {1989},
  month = {1989-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.89-4206},
  language = {en},
}