TY  - RPRT
TI  - Description of knowledge structures within a concept-based curriculum framework.
AU  - C D Ennis
AU  - L K Mueller
AU  - W Zhu
PY  - 1991
DO  - 10.1080/02701367.1991.10608728
UR  - https://pubmed.ncbi.nlm.nih.gov/1925059/
ID  - 1925059
ER  -