https://biblioteca.uaysen.cl/cgi-bin/koha/opac-search.pl?q=ccl=au%3ARuiz%20De%20Velasco%2C%20Ruperto.&format=rss2 3 0 50 ISBN 9788415770763 (e-book) https://biblioteca.uaysen.cl/cgi-bin/koha/opac-detail.pl?biblionumber=203580 By Ruiz De Velasco, Ruperto.. . 1 recurso en línea (xciii, 59 páginas) , Contiene índice. 9788415770763 (e-book)

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