Resumen: This work tries to deepen the misgivings that the implantation and development of the CDU in Spain supposed, discrepancies sometimes derived from personal, professional or ideological disagreements rather than exclusively technical aspects. Throughout three fundamental chronological milestones (la Guerra Civil, the 1950s and La Transicion), he reconstructs the constant efforts of Javier Lasso de la Vega for his settlement and generalization. Idioma: Español DOI: 10.5209/rgid.71730 Año: 2021 Publicado en: Revista general de información y documentación 31, 1 (2021), 179-202 ISSN: 1132-1873 Factor impacto CITESCORE: 0.9 - Social Sciences (Q3)