Soils of North America. US National Soil Survey | ||
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Soils of Europe. Institute of Soil Sciences, Georg-August-University of Goettingen, Germany | ||
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Soils of Canada. University of Northern British Columbia, Canada. | ||
Soils in the Tropics. Soil Science Department of North Carolina State University | ||
Soils of New England states. | ||
Böden
in Niedersachsen, Handbook in German. Niedersächsisches Landesamt für Bodenforschung |
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Böden - die Haut der Erde | ||
Reiseführer - Zu den Böden Deutschlands |
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