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- [6] SELENIUM SUPPLEMENTATION OF GESTATING BEEF-COWS ON SELENIUM-DEFICIENT PASTURES AGRI-PRACTICE, 1991, 12 (02): : 25 - 30
- [8] ON THE VARIATION OF NON-PROTEIN NITROGEN IN COWS MILK KIELER MILCHWIRTSCHAFTLICHE FORSCHUNGSBERICHTE, 1981, 33 (03): : 213 - 220
- [10] COMPARISON OF VOLUNTARY INTAKE AND DIGESTIBILITY BY BEEF-COWS OF DIETS BASED ON OAT STRAW AND SUPPLEMENTED WITH DIFFERENT FORMS OF NON-PROTEIN NITROGEN ANIMAL PRODUCTION, 1978, 26 (APR): : 135 - 141