TY  - RPRT
TI  - Observer evaluation as a tool for field level evaluation of performance.
AU  - P K Weerakoon
AU  - D N Fernando
PY  - 1990
DO  - 10.3109/01421599009006636
UR  - https://pubmed.ncbi.nlm.nih.gov/2095448/
ID  - 2095448
ER  -