المؤلفون: Alfredo Goñi Grandmontagne
الوصول الحر: https://www.europeana.eu/item/9200362/BibliographicResource_3000099938725?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCaTest
الوصول الحر: http://europeana.eu/portal/record/9200362/BibliographicResource_3000099938725.htmlTest