https://www.bielefeld-university-press.de/ Content Type OA ? PCA ? Books (Back List, Front List) Yes 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 U (1) Information Unlocking Luhmann: A Keyword Introduction to Systems Theory Author/Editor: Claudio Baraldi ,Giancarlo Corsi ,Elena Esposito ,Katherine Walker