1. Anon . (1988 ). 1987 and the growth of the crop . Report of Rothamsted Experimental Station for 1987, pp.162 -165 .
2. R. Detavernier, and F. Schneider (1979 ). Organic non-sugars . InSugar Analysis, pp.103 -105 . International Commission for Uniform Methods of Sugar Analysis.
3. Effect of virus yellows on yield of some monogerm cultivars of sugar beet