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- Author(s):
- Guerra, Antonio H., author
- Publication:
- México : Imprenta del Gobierno Federal, 1893
- Subject(s):
- Soil
Hygiene
- Author(s):
- Gouvêa, Hilario de.
- Publication:
- Rio de Janeiro : Villeneuve, 1891
- Subject(s):
- Sanitation
Soil
Brazil