TY  - RPRT
TI  - Time limits for completing fixed ratios. II. Stimulus specificity.
AU  - M D Zeiler
PY  - 1972
DO  - 10.1901/jeab.1972.18-243
UR  - https://pubmed.ncbi.nlm.nih.gov/16811628/
ID  - 16811628
ER  -