| Spraying Equipment And Procedures, Pt 1 - Residual Spraying |
1951 |
U S Public Health Serv |
|
16mm |
|
sound |
| Fly Density Surveys By The Grill Method |
1949 |
U S Public Health Serv |
6 min |
16mm |
Color |
sound |
| Fly Control Through Basic Sanitation |
1950 |
U S Public Health Serv |
9 min |
16mm |
Color |
sound |