TY  - RPRT
TI  - The stratigraphic utility of the trace fossil Pteridichnites biseriatus in the Upper Devonian of eastern West Virginia and western Virginia, USA
AU  - R.R. McDowell
AU  - K.L. Avary
AU  - D.L. Matchen
AU  - J.Q. Britton
PY  - 2007
UR  - https://pubs.usgs.gov/publication/70031772
ID  - 70031772
ER  -