By Urich R   Coronel I   Silva D   Cuberos M   Wulff R D   in Canadian Journal of Botony

ISSN:1480-3305|81|9|945-955

NRC Research Press‎(2003)‎

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By Urich R.W.   Bowerman D.L.   Levisky J.A.   Pflug J. Lloyd   Seiler Frank J.   in Journal of Analytical Toxicology

ISSN:0146-4760|4|2|49-53

Oxford University Press‎(1980)‎

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