Subject
- Chemical agents (Munitions)3
- Chemicals3
- Chemistry, Organic3
- Children's literature3
- Chlorine3
- Coal-tar products3
- Color3
- Comic books, strips, etc.3
- Communication3
- Communication and technology3
- Cooking3
- Cooking, American3
- Dacron3
- Defense industries3
- Drug adulteration3
- Drugs3
- Dyes and dyeing--Equipment and supplies3
- Dynamite3
- Education3
- Electrical engineering3