2. Rendement des champs de maïs http://usda.mannlib.cornell.edu/MannUsda/viewDocumentInfo.do?documentID=1593
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9. Hicks, Dattero & Galup (2006) Five-tier KM hierarchy Knowledge management promotes an integrated approach to identifying, capturing, retrieving, sharing, and evaluating an enterprise’s information assets. These information assets may include databases, documents, policies and procedures, as well as the un-captured tacit expertise and experience stored in individual workers’ heads (Gartner Group, 1999).