TY  - RPRT
TI  - Content analysis: a method for studying clinical nursing problems.
AU  - G C McCain
PY  - 1988
DO  - 10.1016/s0897-1897(88)80029-6
UR  - https://pubmed.ncbi.nlm.nih.gov/3239999/
ID  - 3239999
ER  -