TY  - RPRT
TI  - Establishing operations and reinforcement effects.
AU  - T R Vollmer
AU  - B A Iwata
PY  - 1991
DO  - 10.1901/jaba.1991.24-279
UR  - https://pubmed.ncbi.nlm.nih.gov/1890048/
ID  - 1890048
ER  -