TY  - RPRT
TI  - Class-consistent Differential Reinforcement And Stimulus Class Formation In Pigeons.
AU  - E Meehan
PY  - 1999
DO  - 10.1901/jeab.1999.72-97
UR  - https://pubmed.ncbi.nlm.nih.gov/16812912/
ID  - 16812912
ER  -