Added the capability to lookup author's PPN's in the SWB catalogue.
Added the capability to lookup author's PPN's in the SWB catalogue.

ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools,ubtue/ub_tools