Think of a couple of friends and then : here's one national service every Ryvita enthusiast can do / The Ryvita Company Limited.
- Ryvita Company.
- Date:
- [between 1940 and 1949?]
Licence: In copyright
Credit: Think of a couple of friends and then : here's one national service every Ryvita enthusiast can do / The Ryvita Company Limited. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/b15775884_0002.jp2/full/800%2C/0/default.jpg)