Nickrent, D.L. and Musselman, L.J. (2004) Introduction to Parasitic Flowering Plants. The Plant Health Instruc-tor.
http://www.apsnet.org/edcenter/intropp/PathogenGroups/Pages/ParasiticPlants.aspx
http://dx.doi.org/10.1094/PHI-I-2004-0330-01

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