Fresh water the precious resource.
| Glavni avtor: | |
|---|---|
| Format: | Knjiga | 
| Izdano: | 
        GArden City, N. Y.
          Natural Press for the American Museum of Natural History
    
        1967
     | 
| Teme: | 
| Glavni avtor: | |
|---|---|
| Format: | Knjiga | 
| Izdano: | 
        GArden City, N. Y.
          Natural Press for the American Museum of Natural History
    
        1967
     | 
| Teme: |