TY  - RPRT
TI  - Pigeon same-different concept learning with multiple stimulus classes.
AU  - R G Cook
AU  - J S Katz
AU  - B R Cavoto
PY  - 1997
DO  - 10.1037//0097-7403.23.4.417
UR  - https://pubmed.ncbi.nlm.nih.gov/9411018/
ID  - 9411018
ER  -