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Kōrero: DSIR soil science: 1930–1950

Whārangi 2. Ngā whakaahua, ngā rauemi katoa

Me pēnei te tohu i te whārang

P. J. Tonkin, Soil investigation – DSIR soil science: 1930–1950, Te Ara – the Encyclopedia of New Zealand, https://teara.govt.nz/mi/story/5784/media (accessed 20 June 2026).

He kōrero nā P. J. Tonkin, i tāngia i te 1 March 2009.