المؤلفون: Ullmann, Christian Andreas, Crell, Christoph Ludwig
الوصول الحر: https://www.europeana.eu/item/358/item_AQPHOGUMKXGB2ZLQY7EQDJ5GSQB2MYRJ?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCaTest
الوصول الحر: https://www.europeana.eu/item/358/item_BJVPDLIVJYZSKK2OX5EPK2OHUDNLTNYR?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCaTest
المؤلفون: Ullmann, Christ.
الإتاحة: http://catalogue.bnf.fr/ark:/12148/cb369371904Test
المؤلفون: Crell, Christoph Ludwig, Ullmann, Christian Andreas
الإتاحة: http://data.onb.ac.at/ABO/%2BZ16843560XTest
الوصول الحر: https://www.europeana.eu/item/9200332/ABO__2BZ16843560X?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCaTest