Overleg:Zandloperfiguur (meetkunde)

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The TK" abbreviation[brontekst bewerken]

Hello, my friend. Would you like to help me with this little issue: what does mean the "TK" abbreviation in any period of years in The Netherlands? (TK 2017-2021) for example? Thank you in advance so much. 94.241.231.123 23 nov 2020 21:46 (CET)