Haurongo: Holt, Robert
He whakaaturanga anō
Rārangi pukapuka
Obit. Hastings Standard. 21 June 1909
'Robert Holt & Sons centenary: a century of service to Hawke's Bay'. New Zealand Timber Journal 5, No 7 (1959): 52--59
Simpson, T. E. Kauri to radiata. Auckland, 1973