Cornell Extension et al.: How to Kill a Tree Stump University of Massachusetts: How to Kill a Tree Stump University of Massachusetts: How to Kill a Tree Stump University of Massachusetts Extension: How to Kill a Stump UMass Amherst Extension: How to Kill a Tree Stump University of Massachusetts: How to Kill a Tree Stump http://www.umass.edu/urbantree/factsheets/26killastump.html University of Massachusetts: How to Kill a Tree Stump University of Massachusetts: How to Kill a Tree Stump http://www.umass.edu/urbantree/factsheets/26killastump.html