Medical indoor gymnastics, or, A system of hygienic exercises for home use to be practised anywhere without apparatus or assistance by young and old of either sex, for the preservation of health and general activity / by D. G. M. Schreber ; revised and supplemented by Rudolf Graefe ; translated from the 26th German edition by Herbert A. Day.

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Medical indoor gymnastics, or, A system of hygienic exercises for home use to be practised anywhere without apparatus or assistance by young and old of either sex, for the preservation of health and general activity / by D. G. M. Schreber ; revised and supplemented by Rudolf Graefe ; translated from the 26th German edition by Herbert A. Day. Public Domain Mark. Source: Wellcome Collection.