| Title : Another example of anti-Ytb - |
| Author(s) : Wurzel HA , Haesler W, Jr. |
| Ref : Vox Sang , 14 :460 , 1968 |
| PubMedID: 5686856 |
| Title : The Yt blood groups in American negroes - |
| Author(s) : Wurzel HA , Haesler WE |
| Ref : Vox Sang , 15 :304 , 1968 |
| PubMedID: 5684530 |