archive.org
archive.org
archive.org
onlinebooks.library.upenn.edu
The Online Books Page
https://onlinebooks.library.upenn.edu › webbin › book › lookupname?key=Liebel, Ignaz
amazon.com
amazon.com
babel.hathitrust.org
babel.hathitrust.org
https://babel.hathitrust.org › cgi › pt?id=ucw.ark: › 13960 › t1rf6c75r
abebooks.com
deutsche-biographie.de
Deutsche Biographie
https://www.deutsche-biographie.de › pnd116987375.html?language=en
readanybook.com
books.google.com
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