교과서: Revision history

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Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.

31 January 2021

14 December 2020

21 October 2019

4 June 2018

11 November 2017

21 August 2017

25 May 2017

24 October 2016

2 February 2016

22 August 2015

26 April 2015

14 December 2014

20 May 2014

14 April 2014

5 November 2013

7 April 2012

2 January 2012

21 June 2011

5 May 2011

23 August 2010

2 January 2010

24 December 2009