Category:Variable codes 1 to 6: Revision history

2017 August 3

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2016 October 31

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2011 January 26

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2008 April 25

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• curprev 10:1710:17, 2008 April 25‎ Ttenbergen talk contribs‎ m 354 bytes +354‎ New page: The fields '''Variable codes 1 to 6''' were added to the database some time ago to track temporary study data. Since then, most of the fields have taken on permanent meaning. The meanings ...