P. J. Gregory

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Science and the gardenDavid S. Ingram, Daphne Vince-Prue et al.
Science and the garden
David S. Ingram, Daphne Vince-Prue, P. J. Gregory · 2008 · 341 pages
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Plant rootsP. J. Gregory
Plant roots
P. J. Gregory · 2006 · 351 pages
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