Eric Walker added Inside the Koch Brothers’ Toxic Empire – Rolling Stone to a number of topics

Eric Walker added The Koch Brothers’ Covert Operations | The New Yorker to a number of topics

Eric Walker added The Koch Brothers’ Covert Operations | The New Yorker and Inside the Koch Brothers’ Toxic Empire – Rolling Stone to Koch Petroleum Group, and added Koch Petroleum Group to Koch Industries and Crude oil and petroleum

Eric Walker added a number of topics and a number of links to Crude oil and petroleum, and added Crude oil and petroleum to Hydrocarbons

Eric Walker added a number of topics and a number of links to Koch Industries, and added Koch Industries to Specific energy businesses, Conglomerates and Koch network