TY  - RPRT
TI  - Issues in intervention research: maintaining integrity.
AU  - K T Kirchhoff
AU  - C A Dille
PY  - 1994
DO  - 10.1016/0897-1897(94)90018-3
UR  - https://pubmed.ncbi.nlm.nih.gov/8203878/
ID  - 8203878
ER  -