TY  - RPRT
TI  - The personal tutor system: an evaluation.
AU  - D J Cottrell
AU  - P McCrorie
AU  - F Perrin
PY  - 1994
DO  - 10.1111/j.1365-2923.1994.tb02734.x
UR  - https://pubmed.ncbi.nlm.nih.gov/7862019/
ID  - 7862019
ER  -