Cartoon by Gibbard on the negotiations on New Zealand butter (18 May 1971)
ImageSource and copyright
Source: GIBBARD, Leslie. [Cartoon by Gibbard on the negotiations on New Zealand butter (18 May 1971)]. In: The Guardian. 18-05-1971. p. 1. ISSN 0261-3077.
Copyright: (c) Les Gibbard