TY  - RPRT
TI  - Some faults with external and internal quality control programs.
AU  - D B Tonks
PY  - 1982
DO  - 10.1016/s0009-9120(82)90674-9
UR  - https://pubmed.ncbi.nlm.nih.gov/7094289/
ID  - 7094289
ER  -