The Warburg Institute Library Digital Collection
http://www.sas.ac.uk/warburg/mnemosyne/DigitalCollections.htm
sas.ac.uk - Out of print source material on Medieval and Renaissance studies is available for free.
http://www.sas.ac.uk/warburg/mnemosyne/DigitalCollections.htm
sas.ac.uk - Out of print source material on Medieval and Renaissance studies is available for free.