Barton, Gregory Allen. Empire Forestry and the Origins of Environmentalism. Cambridge University Press, 2002. Cambridge Studies in Historical Geography 34. https://catalog.ufv.ca/uhtbin/cgisirsi/x/0/0/57/5?searchdata1=172585{CKEY}&user_id=WEBSERVER, https://ebookcentral.proquest.com/lib/ufvca/detail.action?docID=202298.