The coal flora of Switzerland, Illustration of the coal flora of Switzerland, copperplate engraving, frontispiece, Buri (sc.); Jeker (sc.), 1883, Oswald Heer: Die Urwelt der Schweiz. Zürich: Schulthess, 1883

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The coal flora of Switzerland, Illustration of the coal flora of Switzerland, copperplate engraving, frontispiece, Buri (sc.); Jeker (sc.), 1883, Oswald Heer: Die Urwelt der Schweiz. Zürich: Schulthess, 1883

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Keywords: 1883, buri, coal, copperplate, der, die, engraving, flora, frontispiece, heer, illustration, jeker, oswald, sc., schulthess, schweiz, switzerland, urwelt, ürich