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L.W. Barnard

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L.W. Barnard

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L.W. Barnard

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W.D. Williams, J.L. Barnard and J.L. Stapleton

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L.W. Barnard, Luc-M. Verheijen and J.H. Waszink

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L.W. Barnard, A.F.J. Klijt, J. Ysbbaebt and L.M.J. Verheijen