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https://blog.tepapa.govt.nz/2016/03/02/a-tribute-to-emeritus-professor-ranginui-joseph-isaac-walker-dcnzm-1-march-1932-29-february-2016-te-whakatohea/
A tribute to Emeritus Professor Ranginui Joseph Isaac Walker, DCNZM (1 March 1932 – 29 February 2016). Te Whakatōhea