1. The reactions and properties of annatto as a cheese colour;Barnicoat;J. Dairy Res.,1937
2. Annatto as a cheese colour;Carrie;J. Dairy Res.,1938
3. Tests for the presence of sugar and salt in milk and cream;Doan;Tenth Ann. Rep., Penna. Assn. of Dairy and Milk Inspectors,1934
4. Official and Tentative Methods of Analysis of the Assoc. of Off. Agric. Chemists, pp. 275 and 279, 4th Ed. 1935.