By van der Merwe C.A.   Cramer M.D.   in Plant and Soil

ISSN:0032-079X|221|1|5-11

Springer Publishing Company ‎(2000)‎

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By McCormick A. J.   Watt D. A.   Cramer M. D.   in Journal of Experimental Botany

ISSN:1460-2431|60|2|357-364

Oxford University Press‎(2009)‎

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By G Hoefsloot   Termorshuizen A.J   Watt D.A.   Cramer M.D   in Plant and Soil

ISSN:0032-079X|277|1-2|85-96

Springer Publishing Company ‎(2005)‎

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