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ARNOLD, F. Utilization of proved sires and sons of proved sires: 578-579. At present only about 1 sire out of 8 is alive when proved and worthy of further use. There is little chance of increasing the use of proved sires except through their sons, or through programmes designed to prove bulls at an ...

Journal of Dairy Science, 1940, 23, pp 473-586

The congress was held in Madrid, Spain on 16-20 June 1980. This vol. of the proceedings comprises abstr. in English and Spanish of the free communications that were presented at the 9 symposia held as part of the congress; vol. I & II give accounts of the plenary sessions and round table...

Editorial Garsi., Madrid, Spain
9th International Congress on Animal Reproduction and Artificial Insemination. Volume III., 1980, pp 504pp.

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