Origins and Evolution of the Concept in the Science Encyclopedia by Net Industries states "Politicide, as [Barbara] Harff and [Ted R.] Gurr define it, refers to the killing of groups of people who are targeted not because of shared ethnic or communal traits, but because of 'their hierarchical position or political opposition to the regime and dominant groups' (p. 360)". This reference does not give the book title to go with the page number.
