TY  - GEN
AU  - Chung,S H
AU  - Herrnstein,R J
TI  - Choice and delay of reinforcement
SN  - 0022-5002
PY  - 2010///0629
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1901/jeab.1967.10-67
ER  -