TY  - RPRT
TI  - Problem-based student-directed learning in medicine.
AU  - R L Coulson
AU  - P J Feltovich
PY  - 1993
DO  - 10.7547/87507315-83-6-319
UR  - https://pubmed.ncbi.nlm.nih.gov/8315585/
ID  - 8315585
ER  -