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["Soort bronnen","Aantal","Procent",null,"Circel 3D de stukken uiteen"]
["Boeken",44,{"$f":"B2/$B$9","v":0.31428571428571428}]
["Kranten",37,0.26428571428571429]
["Tijdschriften",11,7.857142857142857E-2]
["Naslagwerken",2,1.4285714285714285E-2]
["Websites",31,0.22142857142857142]
["Folders",4,2.8571428571428571E-2]
["Filmpjes",11,7.857142857142857E-2]
["Totaal",{"$f":"SUM(B2:B8)","v":140},1]
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[{"$nulls":4},"Een staaf van cirkel met procenten waarbij boeken en tijdschriften links staan (met de categorie “overige”) en al de rest rechts."]

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