| 1 |  | Sustainable water and soil management / Sabine Kunst, Tanja Kruse, Andrea Burmester . - Berlin : Springer , 2002. - XVI,393 tr ; 23 cm
Thông tin xếp giá: 550/A.000011 |
| 2 | | Liquid assets : The critical need to safeguard freshwater ecosystems / Sandra Posttel . - Washington : Worldwatch , 2005. - 78 tr ; 21 cm. - ( Worldwatch paper 170 )
Thông tin xếp giá: 330/A.000111 |