Subjects
- Maciel, Francisco Antonio, 1757-1807.1
- Massachusetts1
- Massachusetts General Hospital.3
- McLean Asylum for the Insane.1
- Medicine1
- Medico-Chirurgical College of Philadelphia.1
- Medico-Chirurgical Hospital (Philadelphia, Pa.)1
- Mexico1
- Middlesex Hospital.2
- Military Hygiene1
- Military Medicine2
- Minnesota1
- Missouri2
- Mother-Child Relations1
- New York1
- New York City3
- New York Hospital.1
- Nurses5
- Obstetrics1
- Occupational Diseases1