@misc{indiciaec1549111f577,
  title = {DATA-MAKING IN INTERNATIONAL RELATIONS.},
  author = {J D SINGER},
  year = {1965},
  doi = {10.1002/bs.3830100107},
  url = {https://pubmed.ncbi.nlm.nih.gov/14285223/},
  note = {Source identifier: 14285223}
}