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2. Studies on ecology and lipolytic activity of Corynebacterium bovis;Bourland;Diss. Abstr. Sect.B.,1971
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4. Bramley, A. J. 1981. The role of hygiene in preventing intramammary infection. Page 62 in Mastitis control and herd management. Tech. Bull. 4, Natl. Inst. Res. Dairying, Reading, England.
5. Practical non-parametric statistics;Conover,1973