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Hermann Hermann Göring Hermann Hoth Hermann Hesse Hermann Fegelein Hermann Balck Hermann Oberth Hermann von Helmholtz Hermann Rorschach Hermann GmeinerTài liệu tham khảo
WikiPedia: Hermann von Helmholtz http://www.bartleby.com/30/125.html http://books.google.com/books?vid=0CZkDzy7hqYWpJVq... http://vlp.mpiwg-berlin.mpg.de/people/data?id=per8... http://www.psych.upenn.edu/backuslab/helmholtz/ind... http://www-history.mcs.st-andrews.ac.uk/Biographie... https://commons.wikimedia.org/wiki/Category:Herman...