1
by Barker, G.
published 2004
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2
by Barker, G.M.
published 2002
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3
by Barker, G.M.
published 2001
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4
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5
by Barker, G.
Published in JRSM (2004)
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6
by BARKER, G.
Published in Annals of Botany (2004)
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7
by BARKER, G.
Published in African Affairs (1998)
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8
by BARKER, G.
Published in African Affairs (1997)
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9
14
by BARKER, G.
Published in Nature (1895)
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16
17
by Barker, G.R.
Published in Anaesthesia (2007)
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19
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20