Свјежа вода — разлика између измена
Садржај обрисан Садржај додат
Спашавам 1 извора и означавам 0 мртвим.) #IABot (v2.0.8.5 |
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Ред 25:
* [https://web.archive.org/web/20060214232127/http://www.pondconservation.org.uk/ Pondconservation.org.uk]
* [https://web.archive.org/web/20171016081301/http://www.pondnetwork.org.uk/ UK National pond monitoring network]
* [http://ga.water.usgs.gov/edu/mearth.html U.S. Geological Survey] {{Wayback|url=http://ga.water.usgs.gov/edu/mearth.html |date=20120806000058 }}
* [http://environment.nationalgeographic.com/environment/freshwater/ Fresh Water National Geographic]
* [http://www.gvsu.edu/haitiwater/ Safe and Sustainable Water for Haiti web site hosted by Grand Valley State University]
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