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- 1988 ,No. 1-4. Bulletin of Labour Statistics. Geneva : International Labour Office, 1988. štvrťročník [Copy count : 1, currently available 0, at library only 1]
- 1988 ,No.. Bulletin of labour statistics : october inquiry results, 1986 and 1987. Geneva : International Labour Office, 1988. ročenka [Copy count : 1, currently available 0, at library only 1]