MICROBIOLOGICAL ASSAY OF VITAMIN B<sub>12</sub> CONTENT OF SERUM USING EUGLENA GRACILIS.Published in:Australian Journal of Experimental Biology & Medical Science, 1958, v. 36, n. 6, p. 603, doi. 10.1038/icb.1958.65By:Nicholas, Deirdre R.;Pitney, W. R.Publication type:Article