@misc{indiciae20d6926247e8,
  title = {The qualitative-quantitative dualism.},
  author = {E J Porter},
  year = {1989},
  doi = {10.1111/j.1547-5069.1989.tb00107.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2659498/},
  note = {Source identifier: 2659498}
}