J. Davidson

Subterranean storage pits for kumara (sweet potato, Ipomoea batatas L. Lam.): Ethnographic, archaeological and experimental research in New Zealand.

M. K. Burtenshaw, J. Davidson, F. Leach, 2007 .

Eucalypt Domestication and Breeding

J. Davidson, G. Wyk, G. van Wyk, 1994 .