1. Disk susceptibility test;Acar,1991
2. Macrolides;Auckenthaler,1986
3. Susceptibility tests: diffusion test procedures;Barry,1991
4. Udder microflora in nonlactating heifers;Boddie;Agri-Practice,1987
5. An timicrobial resistance in streptococcal species isolated from bovine mammary glands;Brown;Am. J. Vet. Res.,1990