Due technical reasons I cannot incorporate the chart in this entry as suggested by OpenDOAR nor can I put a link correctly
http://www.opendoar.org
http://digbig.com/4rqtp
OAI-Metadata should be Open Access (CC-BY)!
On the legal problem see my statement (in German):
http://www.ub.uni-dortmund.de/listen/inetbib/msg29811.html