Haurongo: Castle, Ronald Brian rāua ko Castle, Zillah Vivien
He whakaaturanga anō
Rārangi pukapuka
Obit. [R. B. Castle]. Evening Post. 14 May 1984: 22
Obit. [Z. V. Castle]. Evening Post. 16 Oct. 1997: 13
Palmer, J. M. ‘The Zillah and Ronald Castle musical instrument collection’. New Zealand Crafts No 11 (Spring 1984): 15–16