Analysis of information sources in references of the Wikipedia article "Jon Bluming" in English language version.
Growing up in a Jewish neighbourhood, [Jon Bluming] witnessed numerous atrocities conducted by the German SS during the Second World War.
[Bluming] studied under Mas Oyama in the Kyokushin Kai style, and was the first person anywhere to receive 6th-dan in the style. (He is [by 1999] ranked 10th-dan.)
