Refine your search
Availability
-
Authors
-
Topics
- Adult
- Agricultural Workers' Diseases
- Costs and Cost Analysis
- Efficiency
- Female
- Gastric Acidity Determination
- Health Education
- Hospitals, District
- Hospitals, General
- Hospitals, Public
- Humans
- Hydrogen-Ion Concentration
- Industry
- Male
- Occupational Health Services
- Outpatient Clinics, Hospital
- Rural Health
- USSR
- Work
- organization & administration
- Show more
- Show less
-
Languages