Titre
Effect of age at first calving on milk production, culling rate and lenght of service period
Description
Effect of age at first calving on milk production, culling rate and lenght of service period / by Ola Syrstad
Note
Fotoriproduzione da: 25. Annual meeting of the European association for animal production, Copenhagen(Denmark), 17 to 20 August 1974, Commission on cattle production.
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