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By Tor Bernhardsen. TOR BERNHARDSEN, PhD, is Senior Consultant with Asplan Viak Sør, a Norwegian-based firm of consulting engineers working internationally as one of three owners of NORPLAN. Author Tor Bernhardsen.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.