TY  - RPRT
TI  - Study of spontaneous behavior in squirrel monkey groups: observation techniques, recording devices, numerical evaluation and reliability tests.
AU  - S Hopf
PY  - 1972
DO  - 10.1159/000155455
UR  - https://pubmed.ncbi.nlm.nih.gov/4628330/
ID  - 4628330
ER  -