http://books.google.de/books?id=B3ZDTBUjWDEC&printsec=frontcover&dq=Rolf+Winkelmann+(Oldenburg),+Litauen&source=bl&ots=8FnhCPF7qi&sig=34XMAbD7d-mUZqIGNcNZORtxaJk&hl=de&ei=I0NDTNODHImbOMeGgKQN&sa=X&oi=book_result&ct=result&resnum=6&ved=0CCcQ6AEwBQ#v=onepage&q&f=false