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  1. Monograph on downy mildew of crucifers.
    By: Canada. Agriculture and Agri-Food Canada. Research Branch. - Nashaat, N.I. - Saharan, G.S. - Verma, P.R.
    Publication info: Ottawa :Minister of Supply and Services Canada,1997.
    Holding Institution: Agriculture and Agri-Food Canada (archive.org)
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