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The importance of cassava as a food security crop in Africa and the world Cassava, originally from South America, is the fourth most important source of calories in the developing world after the cereal crops wheat, maize, and rice. Worldwide, it feeds an estimated 700 million people directly or indirectly. Cassava production has increased steadily for the(More)
Data are available on a 1% sample of social security covered employees by industry, age, sex and race for years 1960 and 1965 and their mortality through 1972. Previous papers have reported on overall rates by age, sex and race and on industries in which mortality appears to be increased among younger workers. In this paper mortality ratios, compared to the(More)
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