TY  - RPRT
TI  - CONTINUOUS OPPORTUNITY FOR REINFORCING BRAIN STIMULATION.
AU  - E S VALENSTEIN
AU  - B BEER
PY  - 1964
DO  - 10.1901/jeab.1964.7-183
UR  - https://pubmed.ncbi.nlm.nih.gov/14130100/
ID  - 14130100
ER  -