TY - RPRT TI - Solution of bent-wire problems by monkeys and chimpanzees. AU - R T DAVIS AU - A A McDOWELL AU - H W NISSEN PY - 1957 DO - 10.1037/h0046305 UR - https://pubmed.ncbi.nlm.nih.gov/13481179/ ID - 13481179 ER -