TY  - RPRT
TI  - Key issues in intervention research: a program evaluation perspective.
AU  - M W Lipsey
PY  - 1996
DO  - 10.1002/(sici)1097-0274(199604)29:4<298::aid-ajim4>3.0.co;2-l
UR  - https://pubmed.ncbi.nlm.nih.gov/8728128/
ID  - 8728128
ER  -