TY  - RPRT
TI  - Working and learning in a controlled environment.
AU  - A E Norman
AU  - A A Parrish
PY  - 1999
DO  - 10.1016/s0260-6917(99)80019-7
UR  - https://pubmed.ncbi.nlm.nih.gov/10222964/
ID  - 10222964
ER  -