TY  - RPRT
TI  - Nursing research: obstacles and challenges.
AU  - I M Martinson
PY  - 1976
DO  - 10.1111/j.1547-5069.1976.tb01613.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1044599/
ID  - 1044599
ER  -