> Verlagsreihe
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PPP : Report of progress:
Ceratiocaridae from the upper devonian measures in Warren County by Char. E. Beecher
Harrisburg: Board of Commissioners, 1884
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T2 : Report of progress:
The geology of Bedford and Fulton Counties with two colored geological maps by J. J. Stevenson
Harrisburg: Board of Commissioners, 1882
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PP : Report of progress:
The Permian or Upper Carboniferous flora of West Virginia and S. W. Pennsylvania with thirty-eight plates by WM. M. Fontaine and I. C. White
Harrisburg: Board of Commissioners, 1880
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P : Report of progress:
Atlas to the coal flora of Pennsylvania, and of the carboniferous formation throughout the United States 87 plates, with explanations by Leo Lesquereux
Harrisburg: Board of Commissioners, 1879
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K = 1875:
Report of progress in the Greene and Washington District of the bituminous coal-fields of Western Pennsylvania illustrated with 3 sections and 2 county maps, showing the calculated local dephts of the Pittsburg and Waynesburg coal beds beneath the surface by J. J. Stevenson
Harrisburg: Board of Commissioners, 1876