@misc{indiciae5e015962f8d6,
  title = {The length-difficulty relationship in compound trial-and-error learning.},
  author = {C E NOBLE},
  year = {1957},
  doi = {10.1037/h0040334},
  url = {https://pubmed.ncbi.nlm.nih.gov/13481265/},
  note = {Source identifier: 13481265}
}