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INSTITUCIÓN «FERNANDO EL CATÓLICO»<br />
EXCMA. DIPUTACIÓN DE ZARAGOZA<br />
<strong>Gustavo</strong> <strong>Bu<strong>en</strong>o</strong>, <strong>Los</strong> <strong>límites</strong> <strong>de</strong> <strong>la</strong> <strong>evolución</strong> <strong>en</strong> <strong>el</strong> <strong>ámbito</strong> <strong>de</strong> <strong>la</strong> Sca<strong>la</strong> <strong>Naturae</strong>, Zaragoza 1998