TY  - RPRT
TI  - Massed and spaced extinction in an avoidance conditioning situation.
AU  - J F HALL
PY  - 1955
DO  - 10.1080/00221325.1955.10532904
UR  - https://pubmed.ncbi.nlm.nih.gov/14354165/
ID  - 14354165
ER  -