Mental discipline & educational values / by W.H. Heck.
- Heck, W. H. (William Harry), 1879-1919.
- Date:
- 1909
Licence: In copyright
Credit: Mental discipline & educational values / by W.H. Heck. Source: Wellcome Collection.
130/156 (page 126)
Licence: In copyright
Credit: Mental discipline & educational values / by W.H. Heck. Source: Wellcome Collection.