United States. Public Health and Marine Hospital Service
The rat and its relation to the public health
United States. Public Health and Marine Hospital Service · 2025
ספרייה ציבורית, Project Gutenberg. בלי הרשמה.
RatsRats as carriers of disease
United States. Public Health and Marine Hospital Service · 2025
ספרייה ציבורית, Project Gutenberg. בלי הרשמה.