1. The occurrence of normal plasma levels of 5'Co vitamin B12 in patients with strong suspicion of, or demonstrated by the Schilling test, vitamin B12 malabsorption, has been reported by other workers (McCurdy, 1965; McIntyre and Wagner, 1966);of; found a 31 % incidence of false normals if the lower limit of normal was set at 0 25 % of the dose per litre and 7 % if the lower limit of normal was set at 0-65 % of the dose per litre. On our criteria, three out,1966
2. Vitamin B,, absorption studies: comparison of 'uCo vitamin B,2;Armstrong, B.K.; Woodliff, H.J.,1966
3. Vitamin B1, absorption studies-the effect of carbachol and gastrin on the "Co-labelled vitamin B1, plasma level absorption test in patients with pernicious anaemia;Armstrong, B.K.; Woodliff, H.J.;Med. J. Aust,1967
4. Vitamin B,2 absorption studies; comparison of "7Co vitamin B1, plasma levels with and without parenteral vitamin B11;Armstrong, B.K.; Woodliff, H.J.;Med. J. Aust,1969
5. Plasma, tissue and urinary radioactivity after oral administration of "Co-labelled vitamin B1;Booth, C.C.; Mollin, D.L.;Brit. J. Haemat,1956