1964. Figure 4. Gas mask, showing proper adjustment of facepiece.
Figure 4. Gas mask, showing proper adjustment of facepiece.
Figure 4 from:
R.A. Fulton; Floyd F. Smith; and Ruth L. Busbey. 1964. Respiratory Devices for Protection Against Certain Pesticides. ARS-33-76-1. USDA Agricultural Research Service. 12 p.
Photo by: Unknown
Date: 1964
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program digital collection.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth
1964. Figure 4. Gas mask, showing proper adjustment of facepiece.
Figure 4. Gas mask, showing proper adjustment of facepiece.
Figure 4 from:
R.A. Fulton; Floyd F. Smith; and Ruth L. Busbey. 1964. Respiratory Devices for Protection Against Certain Pesticides. ARS-33-76-1. USDA Agricultural Research Service. 12 p.
Photo by: Unknown
Date: 1964
Credit: USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection.
Source: Aerial Survey Program digital collection.
Image provided by USDA Forest Service, Region 6, State and Private Forestry, Forest Health Protection: www.fs.usda.gov/main/r6/forest-grasslandhealth