TY  - RPRT
TI  - Observing responses in pigeons.
AU  - R T KELLEHER
AU  - W C RIDDLE
AU  - L COOK
PY  - 1962
DO  - 10.1901/jeab.1962.5-3
UR  - https://pubmed.ncbi.nlm.nih.gov/14454921/
ID  - 14454921
ER  -