Croatian National Committee in CIGRE (HRO CIGRE) has managed to digitize the papers from previous JUKO CIGRE Conferences, held in the period 1951 and 1991, as well as papers from eight simposia, that took place between 1975 and 1990.
MAKO CIGRE, with permission from HRO CIGRE, published these papers online.
Papers are available for MAKO CIGRE members only.
The documents are archived in 28 .zip files, and for the moment, it is not possible to search them by keyword or author. However, there is a document containing the list of all conference papers.