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Marco polo sheep line drawing. en Engraved print of Marco Polo sheep from publishing of Brehm Alfred Thierleben Reihe Hufthiere Ordnung Wiederkuer Ruminantia Familie Hornthiere Cavicornia Sippe Schafe Ovis Ovis Polii Katschkar Ovis Polii natrl Gre Engraved by Gustave Mtzel at the latest this version of the book published then