Manuscript entitled, Fossil Flora and Fauna of the Pennsylvanian Period, Will County, Illinois
by George Langford (1876-1964)
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Asterothca squamosa, Pecopteris clintoni, P. ultraminuta and Senftenbergia pennaeformis, page 56.
Note: the scan of the original page 56 is here.
The original page was letter size but the image may have been cropped slightly. 
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Asterotheca squamosa.
 Pecopteris clintoni.
 Pecopteris ultraminuta;
new species, paratype.
 Senftenbergia pennaeformis.
Asterotheca squamosa, GL photographs and sketches, page 56
 Pecopteris clintoni, GL photograph, page 56
 Pecopteris ultraminuta, new species, paratype, GL photograph and sketch, page 56
 Senftenbergia pennaeformis, GL photograph, page 56