янв 20, 2012 | 10:01

www.scribd.com/doc/78730274;Discoveries in Environmental Sciences. 1. New  conceptualization: how ecosystems improve water quality (water self-purification)
** Chinese (Simp.).1.Conceptualization. Ecosystems Improve Water Quality. Water self-purification.创新概念化的生态系统如何改善水质（水体自净）http://www.scribd.com/doc/78739191/
** 1.Concettualizzazione innovativa di come migliorare la qualità degli ecosistemi d'acqua (acqua di auto-purificazione) www.scribd.com/doc/78739087
**Ambientales.1.Conceptualización innovadora de cómo mejorar la calidad de los ecosistemas de agua (la auto-purificación) www.scribd.com/doc/78738968