2018 Cawthron lecture video

Here is the link to Jonathon Porritt’s Thomas Cawthron Memorial lecture.

https://vimeo.com/296992552?fbclid=IwAR0xEJHf3wWIhNszuZ4X_7I3EyWC7QftvbjEVw7NeCWl_316wiSOQovpkBE