Haurongo: Cotton, Charles Andrew
He whakaaturanga anō
Rārangi pukapuka
Obit. New Zealand Geographer 27, No 1 (April 1971): 1–4
Obit. Proceedings of the Royal Society of New Zealand 99 (1970–71): 101–105
'Sir Charles Cotton, geologist and geomorphologist'. New Zealand Journal of Geology and Geophysics 9 (1966): 1–44