Dunn, J. S., & Stolp, M. (1981). Apple production for mechanised harvesting on the Lincoln canopy system. New Zealand Agricultural Engineering Institute.

Dunn, John S., and Martyn Stolp. Apple Production for Mechanised Harvesting on the Lincoln Canopy System. Canterbury, N.Z.: New Zealand Agricultural Engineering Institute, 1981.

Dunn, John S., and Martyn Stolp. Apple Production for Mechanised Harvesting on the Lincoln Canopy System. New Zealand Agricultural Engineering Institute, 1981.