Detail https://www.xponat.net/exponate/detail?tx_pixxponat_exhibitdetail%5Baction%5D=show&tx_pixxponat_exhibitdetail%5Bcontroller%5D=Exhibit&tx_pixxponat_exhibitdetail%5BexhibitId%5D=234&cHash=5b786f45d676f523d8e06ab5ae7752da
Links zum Thema Narwalzahn http://www.biologie-schule.de/narwal-steckbrief.php