TY  - RPRT
TI  - Second-order autoshaped key pecking based on an auditory stimulus.
AU  - J S Burt
AU  - R F Westbrook
PY  - 1980
DO  - 10.1901/jeab.1980.34-305
UR  - https://pubmed.ncbi.nlm.nih.gov/7452133/
ID  - 7452133
ER  -