https://github.com/davepinch/pinchy.cc/blob/master/content/topics/people/g/george-duhamel/the-mediterranean-ends-where-the-olive-tree-no-longer-grows.md
https://web.archive.org/web/20181026133432/http://www.internationaloliveoil.org/web/aa-ingles/oliveWorld/olivo.html