1. Hood, E. G., and White, A. H.: Studies on moulds and yeasts in creamery butter. Part III. Pamphlet No. 92 New Series. Dominion of Canada, Department of Agriculture.
2. Report of sub-committee on microbiological analysis of butter. Jour. Dairy Sci., xiii, No. 5, Sept., 1930.
3. Hood, E. G., and White, A. H.: Part I, Pamphlet No. 92 New Series. Dominion of Canada, Department of Agriculture.
4. Clerkin, P. Estimation of yeasts and moulds in butter. Department of Agriculture Journal, Dublin, xxviii, No. 2.
5. Studies on yeasts in dairy products;Hammer;Jour. Dairy Sci.,1926