Me pēnei te tohu i te whārangi:

Peter Downes. Related biographies for 'Natzke, Franz Oscar', Dictionary of New Zealand Biography, first published in 1998. Te Ara - the Encyclopedia of New Zealand, https://teara.govt.nz/mi/biographies/4n3/natzke-franz-oscar/related-biographies (accessed 13 May 2024)