Balanovsky et al (2008) Figure 3. Distribution of Y Chromosomal Haplogroups R1a, R1b, N3, and N2 in Europe
Population grouping. Most of populations with sample size less than 40 were omitted or pooled. Data on the same group from the different
sources with the sample sizes greater than 40 were pooled when exact localities were not specified in all sources. The map scales are
different for frequent (R1a, R1b, and N3, 10% scale step) and less frequent haplogroups (the other five, 5% step); for all maps, the first
interval indicates virtual absence (less than 1%). The bar graph above the scale shows the portion of the total area covered by the
respective scale interval. Abbreviations in the statistical legend indicate the following: K, number of the studied populations; n, number
of samples in K populations; and MIN, MEAN, and MAX, the minimal, mean and maximum frequencies on the map.