TY  - RPRT
TI  - A self-testing device as an aid to learning.
AU  - D Levinson
PY  - 1970
DO  - 10.1111/j.1365-2923.1970.tb01607.x
UR  - https://pubmed.ncbi.nlm.nih.gov/5485768/
ID  - 5485768
ER  -