2026-08-09T10:29:01Z https://bidilaf.buap.mx/oai_server.xq Biblioteca Digital Lafragua https://bidilaf.buap.mx/oai_server.xq 2.0 ivan.perez@correo.buap.mx 1990-01-01T00:00:00Z transient YYYY-MM-DDThh:mm:ssZ oai bidilaf.buap.mx : oai:bidilaf.buap.mx:86570