TY  - RPRT
TI  - Group selection, altruism, reinforcement, and throwing in human evolution.
AU  - P J Darlington
PY  - 1975
DO  - 10.1073/pnas.72.9.3748
UR  - https://pubmed.ncbi.nlm.nih.gov/1059164/
ID  - 1059164
ER  -