TY  - RPRT
TI  - COMPLEX VISUAL CONCEPT IN THE PIGEON.
AU  - R J HERRNSTEIN
AU  - D H LOVELAND
PY  - 1964
DO  - 10.1126/science.146.3643.549
UR  - https://pubmed.ncbi.nlm.nih.gov/14190250/
ID  - 14190250
ER  -