Subject
- Explosives, Military13
- Defense industries12
- Military supplies12
- Naval stores12
- Mineral industries11
- Insecticides10
- Extrusion process9
- Gums and resins9
- African Americans8
- Cellulose industry8
- Hercules Powder Company8
- Explosives--Testing6
- Laboratories6
- Nitrocellulose6
- Paper chemicals industry6
- Plastics6
- American Association of Petroleum Geologists5
- Founding5
- Polyethers5
- Solder and soldering5