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| Johann Jakob Heckel| http://www.discus-vis.nl/index.php?m=home&p=discus| | [{Image src='https://www.austria-forum.org/cc/images/slim/publicdomain.png' alt='Public domain' align='center' link='https://www.austria-forum.org/cc/public-domain-10.html' target='_blank'}]| Datei:Johann Jakob Heckel.jpg
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