TY  - RPRT
TI  - Individual study and educational technology.
AU  - C E Engel
PY  - 1967
DO  - 10.1111/j.1365-2923.1967.tb01692.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4169952/
ID  - 4169952
ER  -