n200_w1150
Description of the coal flora of the Carboniferous formation in Pennsylvania and throughout the United States ....
Harrisburg,Board of Commissioners for the Second Geological Survey,1879-84..
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Uploaded on October 12, 2015
n200_w1150
Description of the coal flora of the Carboniferous formation in Pennsylvania and throughout the United States ....
Harrisburg,Board of Commissioners for the Second Geological Survey,1879-84..
4,011
views
0
faves
0
comments
Uploaded on October 12, 2015