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Subjects
- Vaccination2
- Warfare2
- Aerospace Medicine1
- Antibody Formation1
- Balkan Peninsula1
- Bone Transplantation1
- Bulgaria1
- California1
- Climate1
- Cold Climate1
- Desert Climate1
- Diet -- economics1
- Ecosystem1
- Food -- economics1
- Fractures, Bone -- surgery1
- History, 20th Century1
- Hydrotherapy1
- Influenza, Human1
- Influenza, Human -- prevention & control1
- Jaw -- injuries1