1. New stain for fetal erythrocytes in peripheral blood smears;Clayton;Obstet. Gynecol.,1970
2. 2. Gorman, J. G. : Personal communication.
3. 3. Gorman, J. G. : Symposium on the Rh Problem. S. E. Massengill Co., 1967.
4. Demonstration von fetalem hamoglobin in den erythrocyten eines blutausstrichs;Kleihauer;Klin. Wschr.,1957
5. Studies on Rh prophylaxis;Pollack;Transfusion,1971