This website is accessible in all its parts by all users without any fee. Only for full-text online books a payment is required, while other records are retrievable for free. A good linking structure is also provided.
Users are allowed to navigate and download all online available material entirely for free
A relevant number of infos and research material are offered free of charge. Only e-books need purchasing
Hoover website shows a clear linking architecture, with some external connections to related and partner organizations