Subject
- Explosives, Military13
- Explosives--Testing6
- Extraction apparatus1
- Extrusion process9
- Fenelon, Stan1
- Fiore, James1
- Fire extinction--Equipment and supplies1
- Forklift trucks1
- Founding5
- Foundry chemistry1
- Graphite2
- Gums and resins9
- Hattaway, Hubbie H.1
- Heiser, Kenneth1
- Hercules Incorporated256
- Hercules Powder Company8
- Hydrogen chloride1
- Industrial efficiency1
- Industrial marketing1
- Industries1