TY  - RPRT
TI  - A framework for understanding "evidence" in prevention research and programs.
AU  - Sheppard G Kellam
AU  - Doris J Langevin
PY  - 2003
DO  - 10.1023/a:1024693321963
UR  - https://pubmed.ncbi.nlm.nih.gov/12940466/
ID  - 12940466
ER  -