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1 Plucknett, D. L.; Smith, N. J. H. 1986. Sustaining agricultural yields: As productivity rises, maintenance research is needed to uphold the grains. Bio Science, 36(1):40-45.
(Location: IWMI-HQ Call no: P 1381 Record No: H03611)
(Location: IWMI-HQ Call no: P 1172 Record No: H04638)
(Location: IWMI-HQ Call no: P 1173 Record No: H04701)
(Location: IWMI-HQ Call no: 630.72 G000 PLU Record No: H07256)
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