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A guide to effective management of germplasm collections / ed. J.M.M. Engels and L. Visser.
- International plant genetic resources institute (IPGRI),
- cop. 2003.
- Rome :
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Working procedures for cocoa germplasm evaluation and selection : proceedings... / ed. A.B. Eskes, J.M.M. Engels and R.A. Lass.
- International plant genetic resources institute (IPGRI),
- cop. 2000.
- Rome :
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A protocol to determine seed storage behaviour / by T.D. Hong and R.H. Ellis ; ed. J.M.M. Engels and J. Toll.
- International plant genetic resources institute (IPGRI),
- 1996.
- Rome :