TY  - RPRT
TI  - Standardization by reference methods: a German viewpoint.
AU  - E S Schmidt
AU  - F W Schmidt
PY  - 1988
DO  - 10.1016/0009-8981(88)90352-x
UR  - https://pubmed.ncbi.nlm.nih.gov/3383425/
ID  - 3383425
ER  -