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R.J. Summerfield, editor
M. Nijhoff Publishers 1988 Current plant science and biotechnology in agriculture
Available at 3 libraries
edited by R.J. Summerfield and E.H. Roberts
Collins 1985
Available at 5 libraries
edited by R. J. Summerfield and A. H. Bunting
Royal Botanic Gardens , Ministry of Agriculture, Fisheries and Food c1980
pbk.
