1. Changes occurring during the blanching of vegetables;Adam;J. Soc. Chem. Ind. Lond.,1942
2. Official methods of analysis;AOAC,1965
3. Official methods of analysis;AOAC,1970
4. Methods of vitamin assay;Association of Vitamin Chemists, Inc.,1947
5. The effect of cooling method on the ascorbic acid and carotene content of spinach, peas and snap beans, preserved by freezing;Bedford,1950