المؤلفون: Castán Sanclemente, Antonio ; Medina Morales, Santiago, García, Jesús
الوصول الحر: https://www.europeana.eu/item/773/https___catalonica_bnc_cat_catalonicahub_lod_oai_mdc_csuc_cat_pegaso____38_ent0?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCaTest
الوصول الحر: https://www.europeana.eu/item/919185/cgi_bin_thumbnail_exe_CISOROOT__pegaso_CISOPTR_38?utm_source=api&utm_medium=api&utm_campaign=YuvuWBeCaTest