1. American Public Health Association. 1958. Recommended methods for the microbiological examination of foods. American Public Health Association. New York.
2. Bell, H. G. 1909. Fungus and bacterial growth on stored flour. Am. Miller37: 280–281.
3. Christensen, C. M. 1946. The quantitative determination of molds in flour. Cereal Chem.23: 322–329.
4. Christensen, C. M. 1947. Molds and bacteria in flour and their significance to the baking industry. Baker's Digest21: 21–23.
5. Christensen, C. M. &M. Cohen. 1950. Numbers, kinds, and source of molds in flour. Cereal Chem.27: 178–185.