Posted by Mary
on February 23, 2021, 8:22 am
Some history.
Mask force: London's five centuries of face coverings
https://www.bbc.com/news/uk-england-london-56085529
WW2 gas masks contained asbestos!
https://hps-beta.azurewebsites.net/publications/hps-weekly-report/volume-53/issue-12/vintage-gas-masks-and-asbestos/
Responses