المؤلفون: Staedtke, Verena
الإتاحة: http://nbn-resolving.de/urn:nbn:de:kobv:188-fudissthesis000000036575-3Test
الوصول الحر: https://www.europeana.eu/item/2048441/item_AJAOKFZQVHZCV7GGIUYPZS3ZT5QL3TIY?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCaTest