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"Urban Trees Enhance Water Infiltration". Fisher, Madeline. The American Society of Agronomy. 17 November 2008. Diarkibkan daripada yang asal pada 2013-06-02. Dicapai pada 31 Oktober 2012. Cite has empty unknown parameter: |dead-url= (bantuan)
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"Urban Trees Enhance Water Infiltration". Fisher, Madeline. The American Society of Agronomy. 17 November 2008. Diarkibkan daripada yang asal pada 2013-06-02. Dicapai pada 31 Oktober 2012. Cite has empty unknown parameter: |dead-url= (bantuan)
"Major floods recharge aquifers". University of New South Wales Science. 24 Januari 2011. Dicapai pada 31 Oktober 2012. Cite has empty unknown parameter: |dead-url= (bantuan)
