An Allele of the S(s) Blood Group Genes Greenwalt, T. J. ; Sasaki, T. ; Sanger, Ruth ; Sneath, Joan ; Race, R. R. Abstract Publication: Proceedings of the National Academy of Science Pub Date: December 1954 DOI: 10.1073/pnas.40.12.1126 Bibcode: 1954PNAS...40.1126G