Notes References Alexander, G. & J. S. Tullett, The Super Men. A.H. & A.W. Reed, Wellington, 1967 (a popular, anecdotal history of the early years of top dressing) D.A. Campbell Some observations on Top dressing in New Zealand, New Zealand Journal of Science and Technology Volume X 1948 (the article which started the industry). Ewing, Ross and MacPherson, Ross The History of New Zealand Aviation, Heinemann, 1986 Geelen, Janic The Topdressers NZ Aviation Press. Te Awamutu, 1983 (a more comprehensive history of New Zealand top dressing, mostly regional, with separate chapters about matters such as aircraft development). Ministry of Agriculture and Fisheries Topdressing Government Press, Wellington, 1973. (a brief manual aimed largely at farmers). External links Origins of aerial topdressing at Te Ara: The Encyclopedia of New Zealand New Zealand topdressing history at techhistory.co.nz Agriculture in New Zealand General aviation Aerial application