Aids to the mathematics of hygiene / [Robert Bruce Ferguson].
- Ferguson, R. Bruce (Robert Bruce)
- Date:
- 1904
Licence: In copyright
Credit: Aids to the mathematics of hygiene / [Robert Bruce Ferguson]. Source: Wellcome Collection.
100/112 (page 88)
Licence: In copyright
Credit: Aids to the mathematics of hygiene / [Robert Bruce Ferguson]. Source: Wellcome Collection.