Cunningham, G.H. 1939: Reports of research committees of the Council of Scientific and Industrial Research. Plant Research Bureau. Plant Diseases Division. New Zealand Department of Scientific and Industrial Research, Annual Report. 13.
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Cunningham, G.H. 1939: Reports of research committees of the Council of Scientific and Industrial Research. Plant Research Bureau. Plant Diseases Division. New Zealand Department of Scientific and Industrial Research, Annual Report. 13.