TY  - RPRT
TI  - Control-group experimentation in psychotherapy.
AU  - E F BORGATTA
AU  - L S COTTRELL
PY  - 1959
DO  - 10.1080/00332747.1959.11023162
UR  - https://pubmed.ncbi.nlm.nih.gov/13634282/
ID  - 13634282
ER  -