Analysis of information sources in references of the Wikipedia article "Blood type distribution by country" in English language version.
... The frequency of blood group A is quite high (25–55%) in Europe, especially in Scandinavia and parts of central Europe. High group A frequency is also found in the Aboriginal people of South Australia (up to 45%) and in certain American Indian tribes where the frequency reaches 35% ...
... 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 ...
... The maximum frequency of the B gene occurs in Central Asia and northern India. The B gene was probably absent from Native Americans and Australian Aboriginal people before racial admixture occurred with the coming of the white man ...
... Blood type B is completely absent in most North and South American Indians ...
Blood Type A: Central and Eastern Europe. Type 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 ...
... The frequency of blood group A is quite high (25–55%) in Europe, especially in Scandinavia and parts of central Europe. High group A frequency is also found in the Aboriginal people of South Australia (up to 45%) and in certain American Indian tribes where the frequency reaches 35% ...
