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  <titleInfo>
    <title>Estudio comparativo de diferentes sistemas de vacunacion contra la enfermedad de Newcastle en pollos de engorde</title>
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    <namePart>Garcia R., Ricardo</namePart>
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  <physicalDescription>
    <extent>25 hojas</extent>
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  <note>48 8</note>
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    <topic>Aves de corral</topic>
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    <topic>Enfermedades</topic>
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    <topic>Vacunas</topic>
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