@misc{indiciae6511ca8656d4,
  title = {Mortar Strength, A Problem of Practical Statistics.},
  author = {J W Gowen and H W Leavitt and W S Evans},
  year = {1925},
  doi = {10.1073/pnas.11.1.11},
  url = {https://pubmed.ncbi.nlm.nih.gov/16586956/},
  note = {Source identifier: 16586956}
}