FREMANTLE, C., DOUGLAS, A. and PRITCHARD, D. 2020. The Harrisons' practice in the context of global environmental policy and politics from the 1960s to 2019: a timeline. In Cartiere, C. and Tan, L. (eds.). The Routledge companion to art in the public realm. Abingdon: Routledge, chapter 28, pages 314-332. Available from: https://doi.org/10.4324/9780429450471-28