Усны инженерчлэл: Засвар хоорондын ялгаа
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Мөр 132:
==Цахим холбоос==
{{Commons|Category:Hydraulic engineering|Усны инженерчлэл}}
* [http://www.iahr.net/site/index.html International Association of Hydraulic Engineering and Research]
* [http://www.worldhistoryblog.com/2006/10/hydraulic-engineering-in-prehistoric.html Hydraulic Engineering in Prehistoric Mexico]
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