Legislative principles of soil conservation.
| Autor principal: | |
|---|---|
| Format: | Llibre | 
| Idioma: | English | 
| Publicat: | Rome
          Food and Agriculture Organization of the United Nations
    
        [c1972]. | 
| Col·lecció: | Food and Agriculture Organization of the United Nations. Soils bulletin
              15 | 
| Matèries: |