%0 Journal Article %A S M Lewis %A N K Shinton %T Cyanmethaemoglobin reference preparations. %D 1980 %R 10.1136/jcp.33.7.700-c %J Journal of Clinical Pathology %P 700-701 %V 33 %N 7 %U https://jcp.bmj.com/content/jclinpath/33/7/700.3.full.pdf