TY  - RPRT
TI  - Map reading by chimpanzees.
AU  - E W Menzel
AU  - D Premack
AU  - G Woodruff
PY  - 1978
DO  - 10.1159/000155845
UR  - https://pubmed.ncbi.nlm.nih.gov/669493/
ID  - 669493
ER  -