Note: In Ireland, the 1986 (Social Networks and Support Systems) and the 1987 (Social Inequality) ISSP modules have been conducted together with the ISSP 1989 module on 'Work Orientations' in 1989. The Irish data for the ISSP modules 1986 and 1987 are not included in the integrated files for 1986 and 1987. Data from Slovenia also is not included in the integrated file due to missing variables (only a few variables of the ISSP 1986 are available). The original data and documentation files from Ireland and Slovenia for ISSP 1986 can be however downloaded as separate data files under the study numbers ZA1303 and ZA1784.