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1874 Woodland US. Statistical Atlas Map showing in five degrees of density t … |
1907 United States. (Base Map includes Vegeta … Statistical Atlas United States. (Base Map includes Vegeta … |
1873 United States showing the Principal Bota … World Atlas Map of the United States showing the Pri … |
1877 Botanical and Zoological Maps of the Uni … National Atlas Gray's Botanical and Zoological Maps of … |
1923 Natural Vegetation. Atlas of American Ag … National Atlas Natural Vegetation. Grassland and Desert … |
1924 Grassland Divisions. Land in Crops, 1919 … National Atlas Grassland Divisions. Land in Crops, 1919 … |
1874 Botanical Divisions of the United States … World Atlas Map of the United States Showing the Pri … |
1878 Gray's Botanical and Zoological Maps of … World Atlas Gray's Botanical and Zoological Maps of … |