Haurongo: Campbell, Douglas Archibald
He whakaaturanga anō
Rārangi pukapuka
‘Douglas A. Campbell’. New Zealand Agricultural Science 1, No 12 (May 1967): 15–16
Obit. Evening Post. 10 March 1969: 11
Obit. New Zealand Soil News 17, No 3 (June 1969): 68–71
Roche, M. M. ‘ “A basic national project”: Doug Campbell’s career in soil conservation in brief retrospect’. New Zealand Soil News 39, No 3 (June 1991): 76–80