1. Varietal differences in the vitamin C (ascorbic acid) content of tomatoes;TRIPP;J. Home Econ.,1937
2. Ascorbic acid (vitamin C) in tomatoes and tomato products;MACLINN;Massachusetts Agrie. Exper. Sta. Bull.,1938
3. The ascorbic acid content of late-winter tomatoes;HOLMES;New Eng. J. Med.,1943
4. Official and Tentative Methods of Analysis of the Association of Official Agricultural Chemists. 6th ed.,1945