http://libreriasiglo.com/ Content Type OA ? PCA ? Books (Back List, Front List) No Yes Request a holdings comparison Portico provides a free holdings comparison service to compare a library’s journal or book holdings to the Portico archive. Search titles and ISSNs by keyword: Show: E-Books All0-9ABCDEFGHIJKLMNOPQRSTUVWXYZ Titles start with N (2) Information Normas de papel Author/Editor: GARCÃA VILLEGAS, Mauricio Nosotros que sentimos diferente Author/Editor: MOTTA, Cristina