Duden Schülerhilfen, Logarithmen und Exponentialgleichungen, 10. Schuljahr: Grundbegriffe, Rechengesetze, Lösungsverfahren 10. Klasse

The items bear minimal signs of past use, such as light scratches or memories in the form of markings. These signs of wear give the items a charming character and tell stories of their previous owners, while not affecting their functionality.