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Credit
Lithographia Angerburgica, sive lapidum et fossilium, in districtu Angerburgensi & ejus vicinia, ad trium vel quatuor milliarium spatium in montibus, agris, arenofodinis & in primis circa lacuum littora & fluviorum ripas, collectorum brevis & succincta considerato / [Georg Andrea Helwing]. Public Domain Mark. Source: Wellcome Collection.