TY  - RPRT
TI  - Interrater variability in a modified Norton Scale.
AU  - A C Ek
AU  - P Bjurulf
PY  - 1987
DO  - 10.1111/j.1471-6712.1987.tb00609.x
UR  - https://pubmed.ncbi.nlm.nih.gov/3447259/
ID  - 3447259
ER  -