George W. Bush, Harken Energy, Jackson Stephens. c. 1979-1990. 4th Version Mark Lombardi Networks Posted on 15 May, 2015 by Robert Tolksdorf15 May, 2015 George W. Bush, Harken Energy, Jackson Stephens. c. 1979-1990. 4th Version is added to our networks page. It will be interesting to compute the differences with the 5th version. Before comparing, we have to normalize the names.