TY  - RPRT
TI  - E-Learning systems: promises and pitfalls.
AU  - Carlyle H Chan
AU  - Lisa I Robbins
DO  - 10.1176/appi.ap.30.6.491
UR  - https://pubmed.ncbi.nlm.nih.gov/17139020/
ID  - 17139020
ER  -