TY  - JOUR
TI  - Case Study Research: Design and Methods
AU  - Harris Chaiklin
PY  - 1991
JO  - The Journal of Nervous and Mental Disease
DO  - 10.1097/00005053-199102000-00025
UR  - https://doi.org/10.1097/00005053-199102000-00025
ER  -