Lösungswege 4, Schulbuch

Bildnachweis S. 9.1: Yana Boiko / Getty Images – iStockphoto; S. 14.1: Uwe Grötzner / Fotolia; S. 32.1: WELTBILD / Interfoto / picturedesk.com; S. 32.2: Oliver Hasselluhn / Getty Images; S. 32.4: Yusuke Ide / Getty Images – iStockphoto; S. 33.1: nortonrsx / Getty Images; S. 35.1: Bjoern Wylezich / Getty Images; S. 36.1: bluedesign / Fotolia; S. 46.1: Alois / Fotolia; S. 46.2: lucagal / Thinkstock; S. 46.3: demerzel21 / Getty Images – iStockphoto; S. 48.1: tupungato / Getty Images – iStockphoto; S. 55.1: Ableimages / Thinkstock; S. 66.1: Jeanette Dietl / Fotolia; S. 68.1: Mariia Vitkovska / Getty Images – iStockphoto; S. 70.1: Georgios Alexandris / Fotolia; S. 78.1: Wirestock / Getty Images – iStockphoto; S. 79.1: skegbydave / Getty Images; S. 80.1: Ridofranz / Getty Images – iStockphoto; S. 82.1: Öbv, Wien; S. 88.1: Unknown author – T O’Donnell, History of Life Insurance in its Formative Years, Chicago: American Conservation Company 1936. 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