2017 http://documentos.una.ac.cr/handle/unadocs/8996 Fri, 08 May 2026 19:27:39 GMT 2026-05-08T19:27:39Z UNA-CECUNA-CIRC-03-2017 http://documentos.una.ac.cr/handle/unadocs/8997 UNA-CECUNA-CIRC-03-2017 Tue, 06 Feb 2018 00:00:00 GMT http://documentos.una.ac.cr/handle/unadocs/8997 2018-02-06T00:00:00Z