Willi Liebherr and his sister, Isolde, are the heads of the Liebherr Group, a large German equipment manufacturer based in Switzerland specializing in cranes, aircraft parts, and mining, with 8.3 billion euros in revenue for 2011.
Swiss "Bilanz" magazine estimates the family's net worth at $7.0 billion.
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Links: en.wikipedia.org
By: Xeba73