TY  - RPRT
TI  - Practical problems in psychiatric field surveys.
AU  - H Davidian
PY  - 1982
DO  - 10.1111/j.1600-0447.1982.tb00897.x
UR  - https://pubmed.ncbi.nlm.nih.gov/6956203/
ID  - 6956203
ER  -