My system : 15 minutes' work a day for health's sake / by J.P. Müller ; specially revised by the author and translated by G.M. Fox-Davies and H.R. Murray.
- Jørgen Peter Müller
- Date:
- [between 1920 and 1929?]
Licence: In copyright
Credit: My system : 15 minutes' work a day for health's sake / by J.P. Müller ; specially revised by the author and translated by G.M. Fox-Davies and H.R. Murray. Source: Wellcome Collection.
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