Subject - Topics
- Mail.1
- Male sorting.1
- Mayors.1
- Medical instruments and apparatus.1
- Microphone1
- Nurses.1
- Operating rooms.1
- Patients.1
- Pharmacy.1
- Physicians.1
- Piano.1
- Postage-stamps.1
- Radio--Receivers and reception.1
- Railroad trains.1
- Science--Study and teaching.1
- Shelving (Furniture)1
- Stools.1
- Trumpet.1
- Welding--Equipment and supplies.1
- Welding.1