1. Barber, I. Pacific 2000. Proceedings of the Fifth International Conference on Easter Island and the Pacific. Los Osos. Wet or dry? An evaluation of extensive archaeological ditch systems from far northern New Zealand, Edited by: Stevenson, C, Lee, G and Morin, F. pp.41–50. Bearsville Press.
2. New Zealand Archaeological Association Monograph 26;Barber I,2004