1. 1. Ceppellini, R. : personal communication.
2. 2. Dunsford, I. and P. Tippett : Unpublished observation cited in ref. 14, p. 182.
3. 3. Gibbs, M. B. , P. Levine , J. White Chambers , M. J. Celano , O. B. Hunter, Jr. , and C. T. English : Quantitative hemagglutination studies of the Rh antigens of a ___/___ Rhnull family. Presented at the 17th annual meeting of the A.A.B.B. in Washington, D. C., 1964.
4. A new “deleted” Rh chromosome;Henningsen;Nature,1958
5. Serological studies on the blood of primates;Landsteiner;J. Exp. Med.,1925