![]() ![]() ![]() ISCO-58 was superseded by ISCO-68, which was adopted by the Eleventh ICLS in 1966. The first complete version of ISCO was adopted in 1957 by the Ninth International Conference of Labour Statisticians (ICLS), it is known as ISCO-58. In addition to ISCO-08, three versions of ISCO were developed in the past.
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