Duiwenhoks is no. 33 John Thorne Uncategorized May 23, 2010 0 Comment Check out this study on our rivers which highlights the importance of the Duiwenhoks river. SA Estuaries – Duiwenhoks ranks as no. 33 in importance. Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window) Related