1. Chemical Composition of Brassica Varieties and Hybrids;Allison;NZ J Ag Res,1966
2. Investigation Leading up to the Certification of Rape Seed in New Zealand;Calder;NZ J Sci Tech A,1938
3. Marrow Stem Kale. Further Investigations;Calder;NZ J Sci Tech A,1944
4. Arable Farm Crops of New Zealand;Claridge,1972
5. Types of Rape Seed used in New Zealand;Hadfield;NZ J Agric.,1931