1. Fiftieth anniversary issue;J. Dairy Sci.,1956
2. Moistu-Trac Bulletin,1979
3. Anonymous. Petrifoss product data. N. Foss Trading, Hillerod, Denmark.
4. Anonymous. The MF-DNA SomataCount test for bovine mastitis. Bull. AB815. Millipore Corp., Bedford, MA.
5. Anonymous. Bulletin. Penicillin Assays, Inc. 33 Harrison Ave., Boston, MA.