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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 sweet potato in the Pacific : the propagation of the plant in relation to its distribution by Yen, D.E Material type: Article; Format: print Language: Eng Journal of the polynesian society 69(4), 1960, n. p: : ill. Availability: Items available for loan: Biblioteca IFEA (1)Call number: Sc.Nat206. Place hold
	3.	No cover image available Natural and human selection in the Pacific sweet potato by Yen, Douglas Drake, Ellen [éd] Material type: Article; Format: print Language: Eng In: Evolution and environment : ill., graph. Availability: Items available for loan: Biblioteca IFEA (1)Call number: Agr181. Place hold
	4.	No cover image available Kumara New Zealand encyclopaedia Material type: Text; Format: print ; Literary form: Not fiction Language: Eng Publication details: [S.l] : [s.n.], 1966 Availability: Items available for loan: Biblioteca IFEA (1)Call number: Am.Agr670. Place hold

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