TY  - RPRT
TI  - Nonstable concurrent choice in pigeons.
AU  - G Schofield
AU  - M Davison
PY  - 1997
DO  - 10.1901/jeab.1997.68-219
UR  - https://pubmed.ncbi.nlm.nih.gov/16812855/
ID  - 16812855
ER  -