Licence: In copyright
Credit: Truly effective control, Selsun (Selenium Suphide, Abbott) suspension. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/b2863360x_0001.jp2/full/800%2C/0/default.jpg)
Licence: In copyright
Credit: Truly effective control, Selsun (Selenium Suphide, Abbott) suspension. Source: Wellcome Collection.