https://www.spherestandards.org/ 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 C (1) Information Carta Humanitaria y Normas Minimas de respuesta Humanitaria Author/Editor: El Proyecto Esfera