@misc{indiciae74362bb7e490,
  title = {Mixed rules in concept learning.},
  author = {R C Haygood and J S Miller},
  year = {1969},
  doi = {10.2466/pr0.1969.25.2.423},
  url = {https://pubmed.ncbi.nlm.nih.gov/5367127/},
  note = {Source identifier: 5367127}
}