1. Race, R. R., andSanger, R. Blood Groups in Man (ed. 4). Blackwell, Oxford, England, 1962.
2. Springer, G. F., Rose, C. S., andGyorgy, P. Blood group mucoids: their distribution and growth-promoting properties for lactobacillus Bifidus var.Penn. J. Lab. & Clin. Med. 43:532, 1954.
3. Evans, D. A. P., McConnell, R. B., Donohoe, W. T. A., Sircus, W., andCrean, G. P. Fucose and agglutinogen contents of gastric juice in subjects with peptic ulcers.J. Lab. & Clin. Med. 61:660, 1963.
4. Aird, I., Bentall, H. H., Mehican, J. A., andRoberts, J. A. F. The blood groups in relation to peptic ulceration and carcinoma of colon, rectum, breast, and bronchus.Brit. M. J. 2: 315, 1954.
5. Clarke, C. A., Cowan, W. K., Edwards, J. W., Howel-Evans, A. W., McConnell, R. B., Woodrow, J. C, andSheppard, P. M. The relationship of the ABO blood groups to duodenal and gastric ulceration.Brit. M. J. 2:643, 1955.