TY  - RPRT
TI  - Accuracy and observer variation.
AU  - P Robinson
AU  - D Wilson
PY  - 1997
DO  - 10.1016/s0009-9260(97)80263-2
UR  - https://pubmed.ncbi.nlm.nih.gov/9285431/
ID  - 9285431
ER  -