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Title: Late Cayugan (Upper Silrian) and Helderbergian (Lower Devonian) Stratigraphy in New York 
Link to PDF: http://purl.org/net/nysl/nysdocs/4745866_TEXT
Series: Bulletin No. 386
Authors: Rickard, L.V.
Publish Year: 1962  NYSM ID: B.386 
Page-Plate-Fig: 157 pp., 28 figs.
Category: Geological
Disiplines: Stratigraphy
Out-of-print: Yes
Keywords: Indian Ladder, helderberg, New York, stratigraphy, devonian, lower, Helderbergian, silrian, upper, cayugan, late,  
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