TY  - RPRT
TI  - Evaluation of extramural programs.
AU  - J A Chappell
AU  - J D Hain
PY  - 1979
DO  - 10.1097/00007611-197906000-00027
UR  - https://pubmed.ncbi.nlm.nih.gov/451660/
ID  - 451660
ER  -