@misc{indiciae6a21f311f4e2,
  title = {Instrumental and expressive learning: some comparisons.},
  author = {R Hiemstra},
  doi = {10.2190/85ux-2l2k-dka5-ae21},
  url = {https://pubmed.ncbi.nlm.nih.gov/892916/},
  note = {Source identifier: 892916}
}