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The gymnastic free exercises of P.H. Ling : a systemized course of gymnastics without apparatus, for the developing and strengthening of the body and improvement of the figure : adapted to the use of medical men, teachers, military men, and parents / arranged by H. Rothstein ; translated, with additions, by M. Roth. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by the National Library of Medicine (U.S.), through the Medical Heritage Library. The original may be consulted at the National Library of Medicine (U.S.)