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1Doctoral thesis bibliotecaWUR NL
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2article bibliotecaUNESCO
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3article bibliotecaUNESCO
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4Article/Letter to editor bibliotecaWUR NL
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5by Wahab, M.A., Mannan, M.A., Huda, M.A., Azim, M.E., Tollervey, A.G., Beveridge, M.C.M.
Published 1999article bibliotecaUNESCO