Blood Transfusion Division, United States Army Medical Research Laboratory (1971). Selected contributions to the literature of blood groups and immunology. 1971 v. 4. United States Army Medical Research Laboratory, Fort Knox, Kentucky. https://books.google.com/books?id=ALilcA7Acd0C. ”... In northern India, in Southern and Central China and in the neighboring Central Asiatic areas, we find the highest known frequencies of B. If we leave this center, the frequency of the B gene decreases almost everywhere ...”
”Distribution of rhesus blood group system in the French basques: a reappraisal using the allele-specific primers PCR method”. Human Heredity 58 (2): sid. 69–72. 2004. doi:10.1159/000083027. PMID 15711086.
Dean 2005, 2.1.4: Blood Type A: Central and Eastern EuropeType A is common in Central and Eastern Europe. In countries such as Austria, Denmark, Norway, and Switzerland, about 45–50% of the population have this blood type, whereas about 40% of Poles and Ukrainians do so. The highest frequencies are found in small, unrelated populations. For example, about 80% of the Blackfoot Indians of Montana have blood type A ....
”Distribution of rhesus blood group system in the French basques: a reappraisal using the allele-specific primers PCR method”. Human Heredity 58 (2): sid. 69–72. 2004. doi:10.1159/000083027. PMID 15711086.