Copyright and competition achiving same goal with different mechanism

BIBTEX Dublin Core ISBD MARC (non-Unicode/MARC-8) MARCXML MODS (XML) RIS MARC (Unicode/UTF-8) MARC (Unicode/UTF-8, Standard)

Other Libraries (WorldCat) Other Databases (Google Scholar) Online Stores (Bookfinder.com) Open Library (openlibrary.org)