By Eilers C.H.A.M.   Koops W.J.   in Outlook on Agriculture

ISSN:0030-7270|33|2|113-123

IP Publishing Ltd‎(2004)‎

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By Budisatria I.G.S.   Udo H.M.J.   Eilers C.H.A.M.   van der Zijpp A.J.   in Outlook on Agriculture

ISSN:0030-7270|36|2|145-152

IP Publishing Ltd‎(2007)‎

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By Eilers C.H.A.M.   Udo W.J. Koops. H.M.J.   Van Keulen H.   Noordhuizen J.P.T.M.   in Outlook on Agriculture

ISSN:0030-7270|30|3|187-194

IP Publishing Ltd‎(2001)‎

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