Licence: In copyright
Credit: Urandil con azul de metileno : sedante de la mucosa urinaria / Azpeco. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/b28884875_0001.jp2/full/800%2C/0/default.jpg)
Licence: In copyright
Credit: Urandil con azul de metileno : sedante de la mucosa urinaria / Azpeco. Source: Wellcome Collection.