Three factors required for a respirator to be effective.
- Physical Description: 1 online resource (1 image) : color
- Publisher: [Washington, D.C.] : Centers for Disease Control and Prevention, National Institute for Occupational Safety and Health, 
The graphic depicts the correct and incorrect ways to wear a respirator.
|Source of Description Note:||
Description based on online resource; title from PDF caption (CDC, viewed Mar. 20, 2020).
Search for related items by subject