1. Abbott, E. V. 1953. Sugarcane and its diseases.Pages 526-535 in The Yearbook of Agricul-ture. US Dept. of Agriculture, Washington,DC.AbbottSugarcane and its diseases526The Yearbook of Agriculture1953
2. Apple, J. L. 1977. The theory of disease man-agement. Pages 79-101 in J. G. Horsfall, ed.Plant Disease: An Advanced Treatise. Aca-demic Press, New York.AppleThe theory of disease management79Plant Disease: An Advanced Treatise1977
3. Genetic improvements in winter wheat yields since 1900 and associated physiological changes
4. CLADOSPORIUM FULVUM RACE 10 AND RESISTANCE TO IT IN TOMATO
5. Barker, R., E. C. Gabler, and D. Winkelmann.1981. Long-term consequences of technolog-ical change on crop yield stability. Pages 53-78 in A. Valdes, ed. Food Security for Devel-oping Countries. Westview Press, Boulder,CO.BarkerLong-term consequences of technological change on crop yield stability53Food Security for Developing Countries1981