@misc{indiciaec20aabc7adc4,
  title = {Nominal variation and class identification: the working and the laboring classes.},
  author = {R CENTERS},
  year = {1950},
  doi = {10.1037/h0058487},
  url = {https://pubmed.ncbi.nlm.nih.gov/15415184/},
  note = {Source identifier: 15415184}
}