Dürckheim, K. G. v. (1971). Hara the vital centre of man. London: Unwin Books.
Trích dẫn kiểu ChicagoDürckheim, Karlfried Graf von. Hara the Vital Centre of Man. London: Unwin Books, 1971.
Deismireacht MLADürckheim, Karlfried Graf von. Hara the Vital Centre of Man. London: Unwin Books, 1971.
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