1. Heat units for corn production in southern Ontario;Brown;Ont. Dept. Agric. Fd. Information Leaflet, 111/31,1969
2. Plant density and yield of shoot dry material in maize in England;Bunting;J. Agric. Sci., Camb.,1971
3. How temperature affects the maize crop;Bunting;Maize Dev. Assoc. Bull.,1973
4. Assessment of factors controlling the productivity of maize in England;Bunting;J. Agric. Sci., Camb.,1951
5. Maize Development Association Bulletin, No. 56, October 1973.