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<strong>Landpac (2008a).</strong> <em>Brochure on Impact Compaction Technology, </em>LAND PAC, Nigel, South Africa. <<a href="http://www.landpac.co.za/Videos&Other/Landpac%20brochure.pdf">http:…; (Date Accessed: June 2009 – page updated October 2008).