Paul O'HaraDec 9, 20221 min readDeep Roots: Original Trees of the Hammer - article in Hamilton Spectatorhttps://www.thespec.com/opinion/contributors/2017/04/27/deep-roots-original-trees-of-the-hammer.html
Native Plant Gardening Notes by Paul O'Harahttps://www.hamiltonpollinatorparadise.org/uploads/1/1/6/8/116871483/native_plant_gardening_notes_-_2015.pdf