1. Intercropping of annual grain legumes with sunflower;Singh;Indian Journal of Agricultural Sciences,1977
2. Indian vegetable oil imports seen declining slightly in 1981, policy changes, portend further drop;Landes;Foreign Agriculture,1981
3. Jones D. B. (1931). Factors for converting percentages of nitrogen in foods and feeds into percentages of proteins. USDA Circular No. 183.
4. Some effects of associated growth on grass and clover under field conditions;Janny;Netherlands Journal of Agricultural Science,1965