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The Roots of the Vikings book by Sturla Ellingvåg - cover. The book is lying outside on a mossy rock.

The Roots of the Vikings - Our Maps in a Book About Scandinavian History

％b ％d，％Y

Towards an International of Rivers and Other Elements of Nature

Towards an International of Rivers and Other Elements of Nature

％b ％d，％Y

Sturla Ellingvåg presenting Viking history using a Grasshopper Geography river basin map of Scandinavia

我们的地图和维京人

％b ％d，％Y

The World Atlas of Rivers, Estuaries and Deltas by Princeton University Press featuring Grasshopper Geography's North America map

世界河流、河口和三角洲地图集

％b ％d，％Y

Living River book by Dave Showalter featuring Grasshopper Geography's Colorado river basin map

生机勃勃的河流：科罗拉多河的承诺

％b ％d，％Y

Hydrate the Earth book cover by Ananda Fitzsimmons.

％b ％d，％Y

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