@misc{indiciae4d077487c61f,
  title = {Tool use and tool making in wild chimpanzees.},
  author = {C Boesch and H Boesch},
  year = {1990},
  doi = {10.1159/000156428},
  url = {https://pubmed.ncbi.nlm.nih.gov/2157651/},
  note = {Source identifier: 2157651}
}