TY  - RPRT
TI  - Definitive methods--reference methods (absolute methods?): their important impact on clinical chemistry.
AU  - B Leijnse
PY  - 1982
DO  - 10.1177/000456328201900419
UR  - https://pubmed.ncbi.nlm.nih.gov/7125580/
ID  - 7125580
ER  -