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	1.	No cover image available Resistance in sweet potato to the scurf and black rot pathogens by Nielsen, L. W Yen, D. E Material type: Article; Format: print Language: Eng New Zealand journal of agricultural research 9(4), 1966, p. 1032-1041: , : ill., tab., rés.(Angl) Availability: Items available for loan: Biblioteca IFEA (1)Call number: Agr219. Place hold
	2.	No cover image available The use of Maize by the New Zealand Maoris by Yen, D. E Material type: Article; Format: print Language: Eng Economic botany 13(4), 1959, p. 319-327: : ill. Availability: Items available for loan: Biblioteca IFEA (1)Call number: Agr182. Place hold

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